Castor

SSR

Castor

/Ultra/Warden

Introduction

Castor is an SSR Ultra awakener in Morimens. Castor's type is Warden. Faction: Foolish One.

Other Ultra awakeners in Morimens: Arachne, Casiah, Clementine, Daffodil, Erica, Horla and 6 more.

Castor's banners

All banners
  • 5 October 2026 to 2 November 2026Obsidian Wings
  • 20 October 2025 to 17 November 2025Obsidian Wings
  • 2 June 2025 to 30 June 2025Obsidian Wings

Stats

  • CON16th132
  • ATK28th120
  • DEF9th140
  • Crit. Rate5%
  • Crit. DMG8th51.2%
  • DMG Amplification1.6%
  • Aliemus Limit100

At level 60 with no talent levels. Each bar is measured against the highest value in the Morimens roster, and the place is out of every awakener with that stat.

  • CONLevel 1: 35Level 60: 132Level 90: 182
  • ATKLevel 1: 32Level 60: 120Level 90: 165
  • DEFLevel 1: 37Level 60: 140Level 90: 193

Base stats with no talent levels, before Wheels of Destiny and Covenants. Edify takes the cap to 60; past that it takes Gnostic Advance and Enlighten 11 and 15.

Cards

6

Numbers at skill level 6. A stat in a number ("135% ATK") is Castor's own, so the card scales with it.

  • Strike

    Strike · Cost 1

    Deal 20% ATK DMG. Castor obtains 10 Aliemus. Quasar: Shuffle 1 "Onyx Plume" into the Draw Pile and gain 30% DEF Shield.

  • Defense

    Defense · Cost 1

    Gain 20% DEF Shield. Castor obtains 10 Aliemus.Quasar: Shuffle 1 "Onyx Plume" into the Draw Pile, gain 30% DEF Shield.

  • Umbral Flight

    Skill · Cost 3

    Deal 70% ATK DMG 3 times, increase other allies' Temporary Crit. DMG by 35%. Quasar: Shuffle 1 "Onyx Plume" into the Draw Pile and gain 30% DEF Shield.

    From Enlighten 2

    Deal 70% ATK DMG 3 times, increase other allies' Temporary Crit. DMG by 35%. For every "Onyx Plume" played this turn, Arithmetica Cost -1. Quasar: Shuffle 1 "Onyx Plume" into the Draw Pile and gain 30% DEF Shield.

  • Stygian Wings

    Skill · Cost 2

    Gain 50% DEF Shield, inflict Weakness on all enemies for 1 turn. Quasar: Shuffle 1 "Onyx Plume" into the Draw Pile, Gain 30% DEF Shield.

    From Enlighten 2

    Gain 50% DEF Shield, inflict Weakness on all enemies for 1 turn. For every "Onyx Plume" in hand, Gain 5 Aliemus. Quasar: Shuffle 1 "Onyx Plume" into the Draw Pile, Gain 30% DEF Shield.

  • Skybound Oath

    Exalt · Cost 2

    Castor gains 50 Aliemus. Rouse: Castor's DMG always critically hits; after playing "Onyx Plume," inflict 320% ATK stacks of Corrosion on the target. Gain +50% Shield from keeping Onyx Plume cards in hand at turn ends.

    From Enlighten 15

    Castor gains 50 Aliemus. Rouse: Castor's DMG always critically hits; after playing "Onyx Plume," inflict 320% ATK stacks of Corrosion on the target. Gain +50% Shield from keeping Onyx Plume cards in hand at turn ends. The first time "Onyx Plume" is played each turn, inflict Corrosion equal to Talent "Cleansing Feathers" on the front-row enemy, and the HP lost when Corrosion is removed increases from 300% to 500%.

  • Dirge of the Unbroken

    Over-Exalt · 100 Aliemus

    Gain 90% DEF Shield and shuffle 3 "Onyx Plume" into the Draw Pile.

Enlighten

15
  • 1Unlocks:

    Caged Underground

    At battle start, place 1 "Onyx Plume" into hand.

  • 2Unlocks:

    Unyielding Will

    For every "Onyx Plume" in hand, playing "Stygian Wings" grants 5 Aliemus. For every "Onyx Plume" you play, the Arithmetica Cost of "Umbral Flight" -1 this turn.

  • 3Unlocks:

    Sky-Eclipsing Wings

    For every 3 "Onyx Plume" you play, obtain 1 Arithmetica and increase Castor's Final DMG by 10% in this battle.

  • 4Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 5Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 6Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 7Unlocks:

    Over the Sea of Thorns

    Add 3 additional "Onyx Plume" to your hand. This turn, increase the amount of Shield retained by "Onyx Plume" by 10% of Castor's DEF, and each time you play an "Onyx Plume" card, additionally inflict Castor's ATK*160% stacks of Corrosion.

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 8Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 9Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 10Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 11Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

    Level cap +5

  • 12Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 13Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 14Unlocks:

    Psyche Surge

    DMG Amplification +1.6%, Crit. DMG +1.2%

  • 15Unlocks:

    Nox Diouskouron

    Rouse "Skybound Oath" is enhanced: Castor's first "Onyx Plume" each turn inflicts "Cleansing Feathers" Corrosion on the front-row enemy. Corrosion removal DMG: 300% → 500%.

    DMG Amplification +1.6%, Crit. DMG +1.2%

    Level cap +5

Talents

4
  • Cleansing Feathers

    Playing "Onyx Plume" for the first time each turn inflicts 840% of Castor's ATK as "Corrosion" on all enemies and grants 10 Aliemus.
    For every 1% DMG Amplification that Castor has, the Base amount of "Corrosion" inflicted +1%.
    After the battle,"Corrosion" inflicted by Castor permanently +20% during this Exploration.
    "Corrosion" inflicted in Boss Battles doubles.
    After inflicting "Corrosion," Castor's DMG output +5% of the amount inflicted this turn.
    DMG dealt by Castor does not remove "Corrosion".

  • Madness Omen

    12 levels

    Gain 60 Aliemus at the start of exploration.

    At level 60.

  • Soulforge Aptitude

    10 levels

    This talent is only effective in the "Astral Reign" stages.
    This Awakener's CON, ATK, and DEF +30%, and they gain 500 Keyflare upon their first Rouse.
    Playing "Onyx Plume" will not add "Arithmetica Harmony". Corrosion inflicted with "Cleansing Feathers" +400% of Castor's ATK. Corrosion inflicted to enemies of the "Church of the Lightbearers" +50%.

    At level 10.

  • Gnostic Potential

    5 levels

    This Awakener gains 10 Levels of Base Attributes.
    ·CON +17
    ·ATK +15
    ·DEF +18

    At level 5.

Keywords

4
Corrosion
When taking Active DMG or Tentacle DMG, remove an equivalent amount of Corrosion stacks and suffer HP loss equal to 300% of the removed stacks. Other types of DMG removes Corrosion stacks at 50% effectiveness.
Quasar
A card's Quasar effects will trigger if it triggers "Dimension Shuttle" when played. This card's Arithmetica Cost reduces by 1 when it's pulled from Ultra Space.
Rouse
Grants the Awakener permanent combat boosts. Repeated Rouse uses don't stack.
Weakness
Active and Tentacle DMG dealt -25%, remove 1 stack at turn end.

Edify

  • 0Level cap: 10Cost: Cognitive Template x9, Rose Scrip x1,800
  • 1Level cap: 20Cost: Psyche Template x9, Rose Scrip x8,100
  • 2Level cap: 30Cost: Psyche Template x18, Rose Scrip x21,600
  • 3Level cap: 40Cost: Gnosis Template x15, Rose Scrip x67,500
  • 4Level cap: 50Cost: Gnosis Template x24, Rose Scrip x129,600
  • 5Level cap: 60Cost: None

Gnostic Advance

10
  • 1Level cap: +2Cost: Gnosis Primer x1, Gnosis Template x36, Rose Scrip x194,400
  • 2Level cap: +4Cost: Gnosis Primer x1, Gnosis Template x42, Rose Scrip x226,800
  • 3Level cap: +6Cost: Gnosis Primer x1, Gnosis Template x48, Rose Scrip x259,200
  • 4Level cap: +8Cost: Gnosis Primer x1, Gnosis Template x54, Rose Scrip x291,600
  • 5Level cap: +10Cost: Gnosis Primer x1, Gnosis Template x60, Rose Scrip x324,000
  • 6Level cap: +12Cost: Refined Gnosis Primer x1, Gnosis Primer x1, Gnosis Template x108, Rose Scrip x583,200
  • 7Level cap: +14Cost: Refined Gnosis Primer x1, Gnosis Primer x1, Gnosis Template x126, Rose Scrip x680,400
  • 8Level cap: +16Cost: Refined Gnosis Primer x1, Gnosis Primer x1, Gnosis Template x144, Rose Scrip x777,600
  • 9Level cap: +18Cost: Refined Gnosis Primer x1, Gnosis Primer x1, Gnosis Template x162, Rose Scrip x874,800
  • 10Level cap: +20Cost: Refined Gnosis Primer x1, Gnosis Primer x1, Gnosis Template x180, Rose Scrip x972,000

Skill upgrades

  • 1 to 2Strike, Defense, skills and Exalt (each): Damaged Ore x9, Rose Scrip x3,150Over-Exalt: Wax Prototype x1, Damaged Ore x18, Rose Scrip x6,300
  • 2 to 3Strike, Defense, skills and Exalt (each): Meteorite Fragment x9, Rose Scrip x12,150Over-Exalt: Wax Prototype x2, Meteorite Fragment x18, Rose Scrip x24,300
  • 3 to 4Strike, Defense, skills and Exalt (each): Wax Prototype x1, Meteorite Fragment x15, Rose Scrip x24,750Over-Exalt: Aetheric Stone x1, Wax Prototype x3, Meteorite Fragment x30, Rose Scrip x49,500
  • 4 to 5Strike, Defense, skills and Exalt (each): Wax Prototype x2, Yucatan's Star x9, Rose Scrip x44,550Over-Exalt: Aetheric Stone x1, Wax Prototype x4, Yucatan's Star x18, Rose Scrip x89,100
  • 5 to 6Strike, Defense, skills and Exalt (each): Aetheric Stone x1, Wax Prototype x3, Yucatan's Star x18, Rose Scrip x89,100Over-Exalt: Aetheric Stone x1, Wax Prototype x5, Yucatan's Star x36, Rose Scrip x178,200

Profile

With wings that stir violent winds to shield his allies, Castor's Onyx Plumes cause lethal "Corrosion," inflicting massive HP loss upon enemies when they take DMG this turn.

He is a stubborn bird; he would rather fall from the sky than be a prisoner of the earth.

Gender
Male
Birthday
June 20
Height
6'0.3'' (wingspan 9'9.8'')
Weight
205 lbs
Voice actor
Kato Shinya
Illustrator
Balabala

Story

5
Basic Information

If born into an ordinary family, Castor might have grown into a modest young man as warm and steady as a tree. But now, he is the only one among the twins who retained a complete body and soul; he remains silent like a stone, waiting to bury that ember the two of them shared in their youth deep within, never giving up, never wavering.

Those already matured wings, capable of stirring up a storm, are now retracted in dormancy, as a bird quietly awaits the moment the cage door opens to once again soar in the sky.

Unlocks at: Awakener Level 1

Story: I

While carrying out a mission on a remote, barren, and little-known plateau far from Londinium, I happened upon an astonishing account in a mountain village with only a handful of residents remaining.

On the night the monster appeared, the sky itself seemed shrouded by an eerie shadow. Fog rolled across the ground, and deep within the clouds, a dim green hue emerged, this was by no means a mere natural phenomenon, but the projection of something alive, something breathing.

From deep within the desolate mountains, bristling with tall trees, a sudden roar, a howling shockwave, erupted. That shriek, belonging to no known creature, stirred fear from the deepest recesses of human instinct.

A massive shadow swept swiftly overhead. The entire mountain shuddered beneath that sky-blotting form, and every branch and leaf trembled in unison, producing a synchronized, whisper-like rustling.

<Italic:"I saw it! Those long, densely packed tentacles, those eyes glowing green, that was without question the source of the horror in the sky. It discovered me, even locked its gaze firmly on me! I truly thought my life would end at that very moment, but perhaps it had just finished a full meal. Before I blacked out from suffocation, it mercifully turned and left.">

This is the only interview with a confirmed eyewitness. The villager, still deeply mired in nightmares to this day, refused to recall further details. However, from the available evidence, this massive dark-green monster, aside from destroying part of the mountain forest like a passing hurricane and leaving behind a few beast skeletons with only traces of blood remaining, showed no greater aggression, behaving much like a predator feeding normally. Perhaps its approach toward the village was driven by nothing more than idle curiosity.

But in the face of any unknown horror, we must prepare for the worst. I will continue my investigation on the @3 Plateau for a period of half a month. Should any other noteworthy signs of danger arise, I will append them to the mission report at once., Excerpt from <Italic:"Mythag Overseas Investigation Notes, A.F.3@2 Annual Compendium">

Unlocks at: Affinity Level 3

Story: II

The experience of interacting with Castor often reveals two strikingly contrasting extremes.

At first glance, his overly serious and composed demeanor closely resembles that of a middle-aged clerk who has spent twenty years working at Londinium Bank: rigid, unromantic, drained of all vitality by monotonous work. When he frowns, he indeed carries a saint-like presence, calm yet exuding authority without raising his voice.

However, upon deeper interaction, you'll discover that all his seemingly conservative behaviors stem from an extremely limited knowledge base and an unparalleled level of bluntness, to the point where he takes any joke directed at him completely seriously.

He often clutches a thick notebook, ceaselessly questioning the Keeper as if he were a toddler still learning to speak. Faced with such earnest and sincere gaze, most people find it difficult to express disdain for those naive questions.

Beyond scriptures related to various beliefs, Castor is insatiably curious about any new knowledge, especially regarding modern society and science; he has even developed a strong interest in experimental research. After being ruthlessly ignored by Doll: Inferno, he turned to relentlessly pursue poor Winkle, who tries to escape from him daily.

If he were in a school classroom, he would be the kind of diligent student adored by teachers, he does not see studying as a burden, but rather views the freedom to absorb interesting knowledge as a heartfelt joy.

However, while the teacher might feel content, some boastful Awakeners become infuriated when faced with his endless logical inquiries, unable to answer them, leaving behind a bewildered Castor reflecting on the profound difficulty of learning and the long road ahead.

Unlocks at: Affinity Level 5

Story: III

What is the price of pursuing freedom and escaping the church? The twins anticipated horrifying punishments, even the loss of their own lives, but they never expected that the most painful thing was never the physical torture, but the flaying of the soul.

Castor stared with bloodshot eyes as Pollux's treasured, lively and magnificent wings were brutally torn off. His own lips were bitten raw, and he waited in madness and guilt, craving for the same pain to befall him.

However, Juliette merely waved her hand, and the severely injured Castor was taken down like a broken sack, thrown into a pool filled with d-slime for the "sin-effacement rite."

The black, viscous slime soaked his injured body, seeping into every wound and covering every feather, making it even harder to breathe.

In the cycle of wounds repeatedly corroding and healing, the image of the torn-out wings spiraled in Castor's dazed mind. He sat in the small cage in agony, wishing he could bear all the torment for his brother. He wished he had been the one to have his wings pulled out that day, yet later he resolutely thought that he must use these wings to fly with his brother towards freedom again.

Castor endured day after day in this hellish pool; time became unperceivable through pain. It felt like waiting for dozens of years, waiting until Castor nearly died again, before he finally crawled out from that dark hell. The eager eyes he faced were met with a cold and disdainful gaze.

"Stop looking at me with that disgusting look! Let me give you another piece of advice, Lord Castor. You and I are merely serving as the Twin Divi of the Lightbearer together. Leave me alone unless you have a serious matter to discuss. It gets annoying, you know?"

Castor did not understand why his brother had completely forgotten him, but he finally realized the meaning of Juliette's deeply meaningful gaze when he left the pool of sin, because she now tightly held the collar that could control him, a guarantee of her absolute confidence.

Unlocks at: Affinity Level 7

Story: IV

Twins are born with nothing but each other, yet Castor continues to savor the taste of loss. Hurt, forgotten, and betrayed, his silent heart is not made of iron, yet he keeps getting back up.

"But it's okay. I'll hold on to your share too," Castor said, looking at his disfigured brother with blind faith. In his heart, he clutches tightly to that faint flame, tirelessly resisting the knife-like wind and snow.

One day, he will climb to the peak of freedom and use his wings to touch the sky's low-hanging curtain. He believes that at the end of that thorny path must lie the bright daylight his younger brother promised him in childhood.

Unlocks at: Affinity Level 9

Voice lines

44
Show all 44 lines
Awaken
Greetings. I am Castor... Was there more I should say? Forgive me, words don't come easily. If you need anything, just ask.
Upgrade: I
These dark feathers grow heavier each day.
Upgrade: II
Will these cursed wings ever find the strength to take flight again...
Upgrade: III
Thank you... for the key to my freedom. For letting me grasp my own fate.
Investigation Begins
Witness this will of mine, this hunger for freedom.
Investigation Success
At last... I've seen the stars from those pages.
Investigation Halted
Guess I never... made it out, huh...
Strike: I
Out of the way!
Strike: II
Fall!
Defense: I
Back off!
Defense: II
You will not get past me.
Hit: I
Just a scratch...
Hit: II
I can take more...
Skill: I
Get behind my wings!
Skill: II
Wind, carry them to death's maw!
Special Skill: I
Vanish with the wind!
Special Skill: II
Vanish with the wind!
Rouse
All birds find their sky eventually.
Exalt
You can't destroy me!
Exalt: II
You can't destroy me!
Over-Exalt
Let the Cataclysm come. This immortal flesh will stand unbroken!
Over-Exalt: II
Let the Cataclysm come. This immortal flesh will stand unbroken!
Enlighten: Observe
When we were children, the rules weren't this strict. Sometimes, Pollux would go off and say something, and magically get a handful of candies. That sweetness... it feels like this moment now.
Enlighten: Ponder
Theology lessons under Albino and the Light Watch filled our days. I dreamed of shorter scriptures, fewer verses to stumble over, fewer reprimands.
Enlighten: Reflect
The High Priestess... Juliette. She was gentle with us then. Her warm smiles made disobedience unthinkable. A pat on the head silenced all protests. We didn't want to let her down. Yeah, don't worry, I don't feel that way anymore... You may pat my head instead.
Enlighten: Insight
Even before that book, we wondered about the world beyond the lake's island, the scarlet walls. Yet when Pollux suffered, I didn't resist. I lack his courage. Unlike Pollux, I am much more cowardly and clumsy.
Enlighten: Elevate
So much unseen... so much undone. Those desolate deep green lakes and the thick fog that lingers on will no longer hold us back. Oceans, cities, farms from the book's pages... I'll see them. With Pollux. With you.
Enlighten: Flourish
These wings are fully grown now. So sturdy, so powerful. Now I can carry both Pollux and you. Call for me when you wish to fly.
Affinity: I
Your generosity unsettles me. The expensive books, the meteorite crystals you gave me... is there a price? Sorry, please forgive my suspicion. I shouldn't doubt you like this.
Affinity: II
We weren't allowed to talk to other people since childhood. "Friend" was a foreign concept to me... until recently. Pollux and I were everything to each other: brothers, friends, fellow prisoners, each other's only solace. Now... perhaps I should make some new friends.
Affinity: III
How should friends get along? Pollux likes ordering me around when he could do those things himself. And I'm willing to help him with those tasks, it's our way of hanging out together. If you want, I'll do something for you too.
Affinity: IV
Do I... sound stupid? Sorry, please forgive my ignorance. My knowledge begins and ends with the Lantern's doctrines. Teach me your likes and dislikes, I'll commit them to memory.
Affinity: V
When you hear the leaves rustling in the trees, you'll know I'm by your side.
Chat: Touch
Would you like to touch my feathers? Sure, go ahead. Should I extend them further?
Chat: About Dissolution
I was immersed in that black, sticky ooze for a long, long time, so long that I forgot about time itself, so long that even Pollux forgot about me. It didn't bring physical pain... just dread, watching my soul dissolve away.
Chat: About Mythag
A school without Theology? Where you choose lessons... skip them? It sounds like a dream.
Chat: What I Like
Sorry, I didn't mean to zone out... You asked me what this feather is? This is... His most prized thing... and now mine. Do you like it? It's pretty, right?
Chat: What I Hate
What I covet most is how you effortlessly trust your companions. Being forgotten... betrayed... the wounds never fade.
Chat: About the Keeper
Could you teach me how to trade? How to exchange items and how to manage the currency obtained, it's truly a profound subject. Gaining freedom is just the start; Pollux and I still have a lot to learn to live independently. May I rely on you?
Chat: About Jenkin
That master thief offered to teach me the best survival skills for just five hundred Leonian Florins... Have I been deceived? No, I believe this is knowledge worth learning, and it's precisely what Pollux and I are lacking... Is it a money issue? I understand. Then, how about I go negotiate with her and pay her four hundred and fifty Leonian Florins instead?
Chat: About Doresain
Ah, I heard he's a master chef... The knowledge of making food is indeed very necessary. Although I'm not that particular about food, Pollux is extremely picky. I should find some time to learn from him... I shouldn't go? Why? The food that mister makes looks delicious though.
Chat: About Daffodil
A store that can fulfill any wish, overflowing with countless treasures... It makes one hesitate to approach. Not that I doubt the lady's power, but "to obtain something, one must pay the corresponding price", this is a lesson Pollux and I have learned through bitter experience, time and again.
Chat: About Karen
Now that I reflect on it, the maids carrying lanterns weren't so different from Pollux and me. We all lived shackled by invisible chains, quietly submitting to our fate. Yet that green maid... she was different. There was a lightness to her, as if she genuinely took pleasure in her duties. Maybe... maybe she had already discovered true freedom.
Chat: About Pollux
Pollux... The Lantern filled his mind with poisonous ideas, but he's actually kind. It's not that he's selfish... He's just terrified. Terrified of losing the Lantern's approval, of vanishing without that fragile sense of identity. His desperation to please them... it's the panic of someone clinging to the only "self" he's ever known.

Art

Castor key art

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