

Introduction
Konstantinos XI is a 5-star servant in Fate/Grand Order with the Man attribute. Konstantinos XI's class is Rider.
On the combined Fate/Grand Order tier list Konstantinos XI is C tier, 295th of the 363 servants ranked, from where 2 community tier lists put Konstantinos XI.
Other servants in Fate/Grand Order with the Man attribute: Alessandro di Cagliostro, Alexander, Altera, Altria Pendragon (Alter), Altria Pendragon Alter (Rider), Altria Pendragon (Santa Alter) and 174 more.
Konstantinos XI's banners
All banners- 11 May 2026 to 18 May 2026Interlude Campaign: Part 19 Kōnstantînos XI Pickup Summon
- 10 July 2025 to 13 July 20258th Anniversary Kōnstantînos XI Pickup Summon
- 27 December 2024 to 30 December 2024New Year's 2025 Countdown Kōnstantînos XI Pickup Summon
- 2 May 2024 to 23 May 2024Traum Pre-Release Kōnstantînos XI Pickup Summon
Profile
Konstantinos XI is voiced by Shinichiro Kamio in Japanese. Chinatsu Kurahana drew him.
Stories
7Character details
The last emperor of the Byzantine Empire, also known as the Eastern Roman Empire. Rome, in all its greatness, is said to have finally died with him, after the fall of Constantinople. Even as the empire was on the verge of ruin, he fought to protect it.
Profile 1
Height/Weight: 171cm, 73kg
Origin: History
Region: Europe
Alignment: Lawful-Good
Sub-Attribute: Human
Gender: Male
While he usually strives to always be polite and friendly, he sometimes speaks and behaves more roughly in times of duress.
Profile 2
A mild-mannered intellectual who projects an air of nobility. Though he seems willing to accept defeat, he is determined to fight as best he can all the same...even if that determination is not readily apparent to anyone else. This, most likely, is owed to the sort of hero he is: the emperor who died with his empire.
For him, the seeming paradox that loss and ruin are inevitable and yet he must still fight them with all the strength he can muster is as natural as breathing.
Profile 3
Hagia Sophia's Prayer: C-
Gives the user the protection of the Hagia Sophia. Unfortunately, this effect doesn't amount to all that much in modern times.
Empire's Decline: EX
Since Kōnstantînos XI was the last emperor of the Byzantine Empire, one could say that ancient Rome's influence died completely on the day Constantinople fell to Mehmed II.
Demise Privilege: C
A variant of Imperial Privilege. Through concentrated effort, it is possible for individuals to acquire certain skills they normally wouldn't possess, though only for a short period of time. Kōnstantînos, being the final emperor of Rome, lacks many of his predecessors' more far-reaching privileges, and on top of that, it takes much more magical energy for him to wield what privileges he does have. But even though he vanished into the battlefield as just another soldier, in the end, he was still able to pass these privileges on to others.
Profile 4
『Theodosius Kōnstantînos』
Rank: B+
NP Type: Anti-Army (Self)
Range: 1
Maximum Targets: 7000
Oath of the Three-Layer Wall.
A pseudo-descent Noble Phantasm which mimics the three-layer wall that made Constantinople impervious to attack. It promises protection for up to 7000 people. Any more than that and it becomes increasingly likely to fail. In fact, Kōnstantînos believes that in practice, it can only actually keep around 1000 people perfectly safe. Now that he has been summoned to Chaldea, he has made it into an even more potent defense to ensure Master and those who stand alongside them remain safe.
Thanks to Kōnstantînos being the last emperor of the Byzantine Empire, this Noble Phantasm can also influence Europeans from the two-hundred year period surrounding his life, whether they are friendly or not. However, this influence varies depending on the person's faith, and has essentially no effect on a strong believer in a different religion.
Profile 5
Kōnstantînos XI was the last emperor of the Byzantine Empire (also known as the Eastern Roman Empire, as he claimed he and his people were descendants of the Roman Empire).
The Byzantine Empire was once a flourishing trade hub, but fell into decline in consequence of religious conflicts between the East and West, as well as relentless attacks from the Ottoman Empire. By the time Kōnstantînos XI ascended to the throne, the empire's territory had already been reduced to Constantinople and the area immediately surrounding the city; no power in such a precarious position could truly be called an empire.
A distant descendant of Michael VIII Palaiologos, the founder of the Palaiologos dynasty (specifically, Michael's grandchild's grandchild's grandchild) Kōnstantînos XI and his family were powerless even to stop their palace from crumbling. Consequently, they were forced to live in a small, only barely habitable section. Some time after Kōnstantînos XI took the throne, the young sultan Mehmed II decided to take Constantinople for himself. However, Kōnstantînos XI rejected Mehmed's envoys when they demanded his surrender, sparking the beginning of Mehmed's desperate siege.
Kōnstantînos XI tried seeking aid and reinforcement from neighboring countries, but with hardly any both able and willing to send troops, he had to face the siege with only a few soldiers and mercenaries. He and his 7000 soldiers held the line against Mehmed's army of a hundred thousand for around two months thanks to his three-layer bulwarks, but in the end, Constantinople ultimately fell.
Perhaps because Kōnstantînos XI waded into the battle himself with his trusty sword, his body's whereabouts remain unknown to this day.
Additional profile
In Traum
Kōnstantînos fought in the war between realms not in defense of humanity, but in revolt against it. He did so for the sole purpose of reinstating Pope Johanna, a being who belonged to Proper Human History even as it relegated her to fiction.
To say she wasn't angry about being forsaken would be a lie, but that alone wouldn't have been enough to spur him to attempt to unite the realms.
No, what drove this emperor here was neither anger, nor hatred, nor love for the nation he once gave his life to defend, but a desire to do whatever he could for this woman who understood she was no more than a fantasy and still stood up for the world who condemned her to that fate.
In his final moments, as he thought back on all that had happened, he did so not as a farewell gesture, but simply to cherish the memories he had cultivated with all his allies and friends.
Stats
- HP76th of 41913,953
- ATK129th of 41910,923
- Star generation296th of 4198.9%
- Star absorption38th of 419198
- Death rate345th of 41945%
- NP gain per hit319th of 4190.52%
- NP gain when hit3%
At level 90. Each bar is measured against the highest value in the Fate/Grand Order roster, and the place is out of every servant with that stat, lowest first for Death rate.
HP and ATK by level
- HP
- ATK
Level 90 is the natural cap for a 5-star; 100 takes 10 Holy Grails and 120 another 20 grails plus Servant Coins, before Fou cards (up to 2,000 HP and 2,000 ATK) and Craft Essences.
Cards and generation
- Arts hits
- 4 (10/20/30/40%)
- Extra hits
- 5 (6/13/20/26/35%)
- Quick hits
- 4 (10/20/30/40%)
- Buster hits
- 3 (16/33/51%)
- Star generation
- 8.9%
- Star absorption
- 198
- Death rate
- 45%
- Party cost
- 16
- NP gain per hit (Arts / Quick / Buster / Extra)
- 0.52% / 0.52% / 0.52% / 0.52%
- NP gain when hit
- 3%
Skills
3
Hagia Sophia's Prayer C-
Skill 1LevelIncrease NP Gain (1 turn) & apply Target Focus (1 turn) for yourself + Gain C. Stars
- NP Gain Up (self, 1 turn)
- 50%
- Charge Gain (self)
- 1
- Target Focus Up (self, 1 turn)
- 300%
- Target Focus Up (self, 1 turn)
- 300%
- C. Star Gain (self)
- 20
- Critical Rate Up (self, 2 turns)
- 20%
- Cooldown
- 6 turns

Empire's Decline EX
Skill 2LevelIncrease ATK (3 turns) & Buster Card effectiveness (3 turns) for all allies + Increase Critical Strength (3 turns) of all [Roman] allies
- ATK Up (all allies, 3 turns)
- 20%
- Buster Up (all allies, 3 turns)
- 20%
- Critical Up (all allies, 3 turns)
- 30%
- Cooldown
- 6 turns

Demise Privilege C
Skill 3LevelIncrease NP Gauge & Critical Strength (3 turns) & gain C. Stars each turn (3 turns) & apply "Increase NP Gauge & Critical Strength (3 turns) & gain C. Stars each turn (3 turns) for one ally in the back excluding yourself when you are defeated" (3 turns) for yourself
- NP Gain (self)
- 30%
- Charge Gain (self)
- 1
- Critical Up (self, 3 turns)
- 30%
- C. Star Gain Per Turn (self, 3 turns)
- 10
- Critical Rate Up (self, 3 turns)
- 10%
- Demise Privilege (self, 3 turns)
- 967664
- Cooldown
- 6 turns
Noble Phantasm
Theodosius Kōnstantînos
Rank B++ · Anti-Army (Self) · 1 hit · strengthenedIncrease Buster Card effectiveness (3 turns) & apply Invincible (1 time, 3 turns, stackable with other Invincible) & greatly increase DEF (1 turn) <effect increases with Overcharge> for all allies + Increase NP Strength (3 turns) <effect increases with Overcharge> for all allies excluding yourself + Apply Damage Cut to all [Roman] allies (1 turn)
- Buster Up (all allies, 3 turns)
- 50%
- DEF Up (all allies, 1 turn, by Overcharge)
- 100%
- NP Strength Up (other allies, 3 turns, by Overcharge)
- 20%
- Damage Cut (all allies, 1 turn)
- 5000
Before the strengthening quest
Theodosius Kōnstantînos
Rank B+ · Anti-Army (Self) · 1 hitIncrease Buster Card effectiveness (3 turns) & apply Invincible (1 time, 1 turn) for yourself + Greatly increase DEF (1 turn) <effect increases with Overcharge> for all allies + Apply Damage Cut to all [Roman] allies (1 turn)
- Buster Up (self, 3 turns)
- 50%
- DEF Up (all allies, 1 turn, by Overcharge)
- 100%
- Damage Cut (all allies, 1 turn)
- 5000
Class and append skills
Increase your Quick Card effectiveness
- Quick Up
- 9%
Increase your Debuff Resist
- Debuff Resist Up
- 18%
Slightly increase your Critical Strength
- Critical Up
- 7.2%
Increase Extra Attack Card's effectiveness by 50% for yourself
Begin battle with NP charged at 20% for yourself
Increase ATK against [Archer] class by 30% for yourself
Increase Critical Strength by 30% for yourself
Apply a state that "reduces skill cooldown by 1 after using it" (1 time <2 times at Lv. 6-9, 3 times at Lv. 10>, goes into effect only 1 time per skill)
Ascensions and costumes
4
Ascension 1
Ascension 2
Ascension 3
Ascension 4
Materials
Ascension
- Ascension 1Materials:
Rider Piece x5QP: 100,000 QP - Ascension 2Materials:
Rider Piece x12
Proof of Hero x22QP: 300,000 QP - Ascension 3Materials:
Rider Monument x5
Meteor Horseshoe x10
Warhorse's Young Horn x3QP: 1,000,000 QP - Ascension 4Materials:
Rider Monument x12
Warhorse's Young Horn x6
Spirit Root x5QP: 3,000,000 QP
4,400,000 QP for all four ascensions.
Skill enhancement (one skill)
- Level 1 to 2Materials:
Gem of Rider x5QP: 200,000 QP - Level 2 to 3Materials:
Gem of Rider x12QP: 400,000 QP - Level 3 to 4Materials:
Magic Gem of Rider x5QP: 1,200,000 QP - Level 4 to 5Materials:
Magic Gem of Rider x12
Meteor Horseshoe x5QP: 1,600,000 QP - Level 5 to 6Materials:
Secret Gem of Rider x5
Meteor Horseshoe x10QP: 4,000,000 QP - Level 6 to 7Materials:
Secret Gem of Rider x12
Proof of Hero x15QP: 5,000,000 QP - Level 7 to 8Materials:
Proof of Hero x29
Aurora Steel x6QP: 10,000,000 QP - Level 8 to 9Materials:
Aurora Steel x18
Crown of Silvery Light x24QP: 12,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 20,000,000 QP
54,400,000 QP to take one skill from 1 to 10, 163,200,000 QP for all three. Append skills share the same table for their levels, paid in the same materials plus Servant Coins to unlock.
Append skill enhancement (one skill)
- Level 1 to 2Materials:
Gem of Rider x5QP: 200,000 QP - Level 2 to 3Materials:
Gem of Rider x12QP: 400,000 QP - Level 3 to 4Materials:
Magic Gem of Rider x5QP: 1,200,000 QP - Level 4 to 5Materials:
Magic Gem of Rider x12
Octuplet Crystals x5QP: 1,600,000 QP - Level 5 to 6Materials:
Secret Gem of Rider x5
Octuplet Crystals x10QP: 4,000,000 QP - Level 6 to 7Materials:
Secret Gem of Rider x12
Great Knight Medal x10QP: 5,000,000 QP - Level 7 to 8Materials:
Great Knight Medal x20
Divine Leyline Spiritron x6QP: 10,000,000 QP - Level 8 to 9Materials:
Divine Leyline Spiritron x18
Scale of Fantasy x24QP: 12,000,000 QP - Level 9 to 10Materials:
Crystallized Lore x1QP: 20,000,000 QP
Palingenesis (Holy Grails)
- 1Level cap: 92QP: 10,000,000 QP
- 2Level cap: 94QP: 11,000,000 QP
- 3Level cap: 96QP: 12,000,000 QP
- 4Level cap: 98QP: 13,000,000 QP
- 5Level cap: 100QP: 15,000,000 QP
- 6Level cap: 102QP: 15,000,000 QP
- 7Level cap: 104QP: 15,000,000 QP
- 8Level cap: 106QP: 15,000,000 QP
- 9Level cap: 108QP: 15,000,000 QP
- 10Level cap: 110QP: 15,000,000 QP
- 11Level cap: 112QP: 15,000,000 QP
- 12Level cap: 114QP: 15,000,000 QP
- 13Level cap: 116QP: 15,000,000 QP
- 14Level cap: 118QP: 15,000,000 QP
- 15Level cap: 120QP: 0 QP
Each summon of this servant gives 90 Servant Coins.
Bond
- 9,125Bond 2: 15,250Bond 3: 21,375Bond 4: 27,500Bond 5: 310,000Bond 6: 610,000Bond 7: 930,000Bond 8: 1,270,000Bond 9: 1,640,000Bond 10: 2,730,000
Total bond points to reach each level.

When defeated, increase ATK by 20% (3 turns) & recover 5000 HP for all allies except yourself only if [servantName 404700] (Rider) is equipped with this Craft Essence
Voice lines
63Home (24)
- Bond Level 1
- Oh, it's you, Master. What do you want?
- Bond Level 2
- Master? Did something happen? I'll gladly accept your request if it's an escort mission.
- Bond Level 3
- You want to know why I pray? That's a good question. Even if my prayers reach God, I'm not sure if God would answer. So in that sense, prayer may be meaningless. But think about it this way: if prayer were effective and meaningful every time, it becomes a commodity. So prayer without profit may be the true essence of faith.
- Bond Level 4
- Servants protect Master...and I have a particular specialization in protection, though not to the point of a Shielder. But if push comes to shove... You can ride a horse, right Master? I'll focus on making sure you escape.
- Bond Level 5
- You are alive. That is the greatest reason we need to protect you. You are the only one who can defend humanity and pave the way for history. In other words... I will risk my life for you... I will offer you my powers. I used to be human too, after all. I just want to do everything I can for the person I love.
- Bond Level 5 (After Realm of the Thanatos Impulse, Traum)
- I see, so that's what happened. I did inherit the record, but it just doesn't feel real. But it must have been an extremely vivid memory for that other me. So, I won't do anything that would tarnish his pride. But honestly, fate certainly works in strange ways, doesn't it...?
- Conversation 1
- Master, isn't it time for an expedition?
- Conversation 2
- You are my lord. Even if I am an emperor, that position wouldn't and shouldn't change.
- Conversation 3
- My relationship with Master... I think it's any ordinary Master and Servant relationship. I think it's a healthy relationship, if you ask me.
- Likes
- What I like? I do like chess and shogi. Mahjong is no good since there's too much luck involved. Card games would depend on the game we're talking about.
- Dislikes
- What I dislike? I don't like things that I can't protect until the end. I also don't like sieges, especially hopeless ones.
- About the Holy Grail
- The Holy Grail... No, there isn't anything I want to wish for. The wishing should be left to you. And as long as that wish doesn't violate the laws I'm bound to uphold, I will do my best to fulfill it.
- Conversation 4
- Saint George... Georgios! What a privilege to fight alongside a saint like you!
- Conversation 5
- Saint Martha! What an honor! Let us protect Master together.
- Conversation 6
- Oh, Lady Martha? I thought I just saw you throw a very smooth yet sharp punch... What's that? It was my imagination? Ah, I see! It was just my imagination! Do you think I just imagined that because I am tired?
- Conversation 7
- O renowned emperors of Rome! Please...forgive my sins...
- Conversation 8
- Lady Jeanne d'Arc! We lived in the same age, and so I would like to offer my utmost respect. Now, let us pray together. Pray not for yourself, but for someone else. I know you're the sort who can do that.
- Conversation 9
- So you are Johanna. I am relieved. It seems like the memory of you only exists in my other self. Nevertheless, we are both devoted to the same God. If you are ever in trouble, you can tell me, and I will lend you my strength.
- Conversation 10
- A different aspect of Jeanne d'Arc... So a dragon witch who is an embodiment of all kinds of evil. I shouldn't let my guard down just because they have the same face. I'll make sure I keep me on my toes.
- Conversation 11
- A different aspect of Jeanne d'Arc...in her swimsuit Spiritron Dress? Isn't that weird? ...It...isn't? I guess I shouldn't let my guard down just because they have the same face. I should be careful when I talk to her, especially when she's working on her manga because she's irritable? I see... So many things to keep in mind!
- Conversation 12
- So he's the legendary king of Sparta. As a fellow soldier who specializes in defense, I would love to take inspiration from him. Yet, his firm, stalwart stance is quintessentially Spartan. Maybe it's best that I approach him from a different side.
- Conversation 13
- So that's Karl der Große! Well, someone who is slightly different from Karl der Große, to be exact... But his indomitable kingly spirit really is something. I'm so very envious. Eh? Karl der Große!? Oh...could this be a fruit? I-I gratefully accept! Thank you. (Munch, munch)
- During an Event
- It is time to celebrate, Master.
- Birthday
- Being born and being here may be similar, but they are not the same thing, as it was your will that brought you here. Either way, we must celebrate. Happy birthday, Master.
Growth (6)
- Level up 1
- Embers, huh? [id 404700_0_G011]Can we substitute them with Greek fire?
- Level up 2
- Ability improvements confirmed. [id 404700_0_G111]Thanks.
- Ascension 1
- This is my original Spirit Origin output. [id 404700_0_G031]I'm always solemn whenever I wear this outfit, [delay 2.6]as I feel like I'm shouldering the weight of my entire nation.
- Ascension 2
- Ah, no changes. [id 404700_0_G021]But I feel like a little push will draw something else out. [id 404700_0_G022]I hope you'll stay with me until that happens.
- Ascension 3
- Yes, I remember this. [id 404700_0_G041]This was when I prayed with my people in the Hagia Sophia Cathedral... [id 404700_0_G042]While the scene looks glamorous, [delay 1.8]I had to prepare myself to stain this armor with blood. [id 404700_0_G043]I am ready now. [id 404700_0_G044]Let's go!
- Ascension 4
- Master, there you are! [id 404700_0_G051]Don't fret. As someone who's been defeated once already, [delay 3.2]I'm sure I was called here to help you through the predicament you're in. [id 404700_0_G052]So there's no need for you to be uneasy. I am here, after all. [id 404700_0_G053]Now let's go! Your survival will mean victory for me!
First summon (1)
- Summon
- Servant, Rider. I am Kōnstantînos XI. I am the final emperor of the great Roman Empire. I will devote myself to making your wishes come true.
Event (30)
- Battle Start 1
- I shall rise to the occasion for my great nation!
- Battle Start 2
- Facing such a formidable foe brings me joy!
- Battle Start 3
- Permit me to take up my sword. Let's go!
- Skill 1
- I declare to you all!
- Skill 2
- O sword, my favorite steed!
- Skill 3
- Will we be able to win this battle?
- Skill 4
- Dedication is all it takes!
- Command Card 1
- Hm.
- Command Card 2
- Understood.
- Command Card 3
- I'll take care of it.
- Noble Phantasm Card {0}
- The time has come for the great wall of our nation to rise!
- Noble Phantasm Card {0}
- Time for my Noble Phantasm. Leave it to me!
- Noble Phantasm Card {0}
- O Lord, please grant a miracle to me!
- Attack 1
- Ha!
- Attack 2
- Fire, fire, fire!
- Attack 3
- Run!
- Attack 4
- Got them!
- Attack 5
- Reveal the Lord's majesty!
- Attack 6
- Protect it all!
- Extra Attack {0}
- Ready cannons! Begin assault!
- Extra Attack {0}
- All troops charge! Follow me!
- Extra Attack {0}
- This is the moment of truth. Let's go!
- Damage 1
- WITHSTAND IT!!!
- Damage 2
- Kngh.
- Incapacitated 1
- Everyone else stay back... I must be the one who will protect... Kngh...
- Incapacitated 2
- I can't move... So this is the end... Sorry Master...
- Victory 1
- Don't let your guard down! Er...sorry. I guess now's not the time to celebrate.
- Victory 2
- It's time for our triumphant return. Come on, let's go together.
- Victory 3
- We managed to win. Good work, everyone!
- Victory 4
- We won...but we'll see if it's a true victory.
My Room (2)
- Noble Phantasm {0}
- No matter how many invasions there be, [delay 2.1]nothing shall overcome our faith! [id 404700_0_B051]Theodosius Kōnstantînos! [id 404700_0_B052]We will never yield! [id 404700_0_B053]Even if this body perishes, [delay 2.1]our motherland shall endure, eternal!
- Noble Phantasm {0}
- Will we perish? [delay 2.1]No, I refuse to go down! [id 404700_0_B801]Theodosius Kōnstantînos! [id 404700_0_B802]I am here...right here! [id 404700_0_B803]We will be the true wall to hold back our enemies!
Voiced by Shinichiro Kamio. Illustrated by Chinatsu Kurahana.
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