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Koyuki

Millennium Science School

Koyuki

★★★

/Mystic/Attacker

Ctier

Introduction

Koyuki is a 3-star Mystic student in Blue Archive. Koyuki's role is Attacker. School: Millennium Science School.

On the Blue Archive tier list Koyuki is C tier, 163rd of the 242 students ranked.

Other Mystic students in Blue Archive: Akane (Bunny), Akari (New Year), Ako, Aris, Aris (Armed), Aris (Maid) and 61 more.

What Koyuki does

Her EX throws a random bomb into a circle, but all three outcomes land close together, between 398% and 444% at max level, each with a matching 40-second Attack buff. Every 30 seconds she shoots one enemy and two nearby ones, and with gear, every six kills from that skill make her next EX 3 cost cheaper.

Koyuki in raids

On the raids usage list Koyuki is D tier, 210th of 264: brought by 0.2% of ranked Global players to the last 8 raids, on average.

  • Raid usage0.21%

By raid, newest first

  • Hod (Indoor)0.1%
  • Gregorius (Indoor)0%
  • Hovercraft (Outdoor)0.2%
  • Drumbarka (Street)0.1%
  • Myouki Kurokage (Street)0.6%
  • KAITEN FX Mk.0 (Street)0.1%
  • Perorodzilla (Outdoor)0.6%
  • Goz (Outdoor)0.1%

Koyuki's banners

All banners
  • 15 October 2024 to 22 October 2024Pick-Up Recruitment
  • 5 September 2023 to 19 September 2023Pick-Up Recruitment

Profile

A brilliant yet troublesome member of Millennium's Seminar.

She's completely unaware of her unrivaled talent for mathematical decryption. She always sets out to test her luck. Even if she goes too far and lands in hot water, she never stops.

Koyuki's full name is Kurosaki Koyuki. Koyuki's birthday is February 14th, and Koyuki stands 4'11" tall. Koyuki is voiced by 乾夏寧 in Japanese and Kim Bona in Korean. Koyuki's hobby is testing her luck and escaping. MISOM150 drew Koyuki.

Stats

  • Max HP196th22,818
  • ATK27th4,828
  • DEF71st418
  • Healing144th5,933
  • Accuracy221st104
  • Evasion224th190
  • Crit149th209
  • Crit DMG200%
  • Stability171st1,332
  • Normal Attack Range94th750
  • Cost Recovery700

At level 90 and 5 stars, before the Exclusive Weapon, equipment, Talents and Relationship Rank. Each bar is measured against the highest value in the Blue Archive roster, and the place is out of every student with that stat.

At level 1 and 90

  • Max HPLevel 1, 3 stars: 2,398Level 90, 3 stars: 18,930Level 90, 5 stars: 22,818
  • ATKLevel 1, 3 stars: 424Level 90, 3 stars: 3,850Level 90, 5 stars: 4,828
  • DEFLevel 1, 3 stars: 76Level 90, 3 stars: 418Level 90, 5 stars: 418
  • HealingLevel 1, 3 stars: 1,724Level 90, 3 stars: 4,825Level 90, 5 stars: 5,933
  • AccuracyLevel 1, 3 stars: 104Level 90, 3 stars: 104Level 90, 5 stars: 104
  • EvasionLevel 1, 3 stars: 190Level 90, 3 stars: 190Level 90, 5 stars: 190
  • CritLevel 1, 3 stars: 209Level 90, 3 stars: 209Level 90, 5 stars: 209
  • Crit ResLevel 1, 3 stars: 100Level 90, 3 stars: 100Level 90, 5 stars: 100
  • Crit DMGLevel 1, 3 stars: 200%Level 90, 3 stars: 200%Level 90, 5 stars: 200%
  • Crit DMG ResLevel 1, 3 stars: 50%Level 90, 3 stars: 50%Level 90, 5 stars: 50%
  • StabilityLevel 1, 3 stars: 1,332Level 90, 3 stars: 1,332Level 90, 5 stars: 1,332
  • Normal Attack RangeLevel 1, 3 stars: 750Level 90, 3 stars: 750Level 90, 5 stars: 750
  • CC PowerLevel 1, 3 stars: 100Level 90, 3 stars: 100Level 90, 5 stars: 100
  • CC ResLevel 1, 3 stars: 100Level 90, 3 stars: 100Level 90, 5 stars: 100
  • Recovery BoostLevel 1, 3 stars: 100%Level 90, 3 stars: 100%Level 90, 5 stars: 100%
  • Cost RecoveryLevel 1, 3 stars: 700Level 90, 3 stars: 700Level 90, 5 stars: 700
  • Mag CountLevel 1, 3 stars: 25Level 90, 3 stars: 25Level 90, 5 stars: 25
  • DEF PenetrationLevel 1, 3 stars: 0Level 90, 3 stars: 0Level 90, 5 stars: 0
  • MobilityLevel 1, 3 stars: 200Level 90, 3 stars: 200Level 90, 5 stars: 200

Before the Exclusive Weapon, equipment, Talents and Relationship Rank. Stars raise ATK, Max HP and Healing only.

Combat profile

Squad
Striker (fights on the field)
Position
Back
Attack type
Mystic
Armor type
Heavy
Weapon
Machine gun
School
Millennium Science School
Club
Seminar
Year and age
1st Year, 15 years old
Equipment slots
Gloves, Hairpin, Watch

Terrain affinity

  • UrbanS (SS with the weapon at 3 stars)
  • OutdoorD
  • IndoorB

Affinity sets how well a student fights on each stage type, from D up to SS.

Skills

6

  • Unexpected Variable

    EX Skill · Cost 4
    Level

    Deals damage by throwing 1 bomb arbitrarily at enemies in a circular area. Bullet: Deals 444% of ATK as damage. Electric Field: Deals 421% of ATK as damage. Flame: Deals 398% of ATK as damage.

  • One? Or Two?!

    Basic Skill
    Level

    Deals 385% of ATK as damage to 1 target, and up to 2 nearby enemies, every 30 sec. Reloads instantly.

  • One? Or Two?!+

    Basic Skill +
    Level

    Deals 463% of ATK as damage to 1 target, and up to 3 nearby enemies, every 30 sec. Reloads instantly. After defeating 6 enemies with Basic Skill, decreases its own EX Skill Cost by 3 (up to 1 time).

    Replaces One? Or Two?! once Koyuki's Unique Item reaches T2.

  • Do You Believe in Miracles?

    Enhanced Skill
    Level

    Increases ATK by 26.6%.

  • Do You Believe in Miracles?+

    Enhanced Skill +
    Level

    Increases ATK by 792. Also increases ATK by 26.6%.

    Replaces Do You Believe in Miracles? once Koyuki's Exclusive Weapon reaches 2 stars.

  • Butterfly Effect

    Sub Skill
    Level

    Increases ATK when using an EX Skill, based on the type of bomb used (for 40 sec). Bullet: Increases ATK by 29.1%. Electric Field: Increases ATK by 27.5%. Flame: Increases ATK by 26%.

Exclusive Weapon

Upgrade planner

Mulli-Gun

Machine gun

A machine gun that's been through the wringer alongside Koyuki. Once, it was entirely submerged in seawater. During the repair process, its color changed. Other than that, it's still as sturdy as Koyuki, who never worries about such trivialities.

  • 1 starLv. 30: ATK +555, Max HP +1,952
  • 2 starsLv. 40: ATK +693, Max HP +2,440Enhanced Skill becomes Do You Believe in Miracles?+
  • 3 starsLv. 50: ATK +832, Max HP +2,927Urban affinity S to SS
  • 4 starsLv. 60: ATK +971, Max HP +3,416Mystic damage +10%

Unique Item

Challenge Coin

A coin that Koyuki drilled a hole in. It was originally made so that she could play arcade machines for free, but it's now useless because of modern card readers.

  • T1ATK +500From Relationship Rank 15
  • T2Basic Skill becomes One? Or Two?!+From Relationship Rank 20

Stars and Relationship Rank

Star bonuses

  • 4 starsBonus over 1 star: ATK +14%, Max HP +9%, Healing +12%Rank cap: 30
  • 5 starsBonus over 1 star: ATK +31%, Max HP +23%, Healing +27%Rank cap: 100

Koyuki starts at 3 stars. Each star also lifts the Relationship Rank cap.

Relationship Rank bonus

  • 5Total bonus: ATK +12
  • 10Total bonus: ATK +37
  • 15Total bonus: ATK +72, Max HP +235
  • 20Total bonus: ATK +117, Max HP +515
  • 25Total bonus: ATK +127, Max HP +565
  • 30Total bonus: ATK +137, Max HP +615
  • 35Total bonus: ATK +152, Max HP +690
  • 40Total bonus: ATK +167, Max HP +765
  • 45Total bonus: ATK +197, Max HP +885
  • 50Total bonus: ATK +227, Max HP +1,005

Stats stop growing at rank 50.

Talents

  • Max HP25 levels, up to +5%
  • ATK25 levels, up to +5%
  • Healing25 levels, up to +5% (little use for Koyuki)

Gifts Koyuki likes

7

Favourites

  • Brain Teaser Puzzle Cube

Also liked

  • Board Game "The Life"
  • 30-Color Paint Set
  • Astronomical Telescope
  • Cosplayer Coke-Bottle Glasses
  • Teddy Bear with Bow
  • World's Most Useless Gadget

A gift gives more Relationship Rank EXP the more of Koyuki's favourite-item tags it carries. Gifts not listed still give the base amount.

Lines and Memorial Lobby

When recruited: When the plan falls apart, well... That's when life gets interesting!

MomoTalk status: It's my fault?!

Koyuki's Recollection Lobby
Koyuki's Recollection Lobby

Upgrade costs

Open in the planner

EX Skill

  • Lv. 2Credit Points ×80,000Beginner Tactical Training Blu-ray (Millennium) ×12Voynich Manuscript Page ×12
  • Lv. 3Credit Points ×500,000Normal Tactical Training Blu-ray (Millennium) ×12Beginner Tactical Training Blu-ray (Millennium) ×18Damaged Voynich Manuscript ×13Crystal Haniwa Fragment ×31
  • Lv. 4Credit Points ×3,000,000Advanced Tactical Training Blu-ray (Millennium) ×12Normal Tactical Training Blu-ray (Millennium) ×18Annotated Voynich Manuscript ×11Broken Crystal Haniwa ×24
  • Lv. 5Credit Points ×10,000,000Superior Tactical Training Blu-ray (Millennium) ×8Advanced Tactical Training Blu-ray (Millennium) ×18Intact Voynich Manuscript ×6Repaired Crystal Haniwa ×20

Basic, Enhanced and Sub Skills

  • Lv. 2Credit Points ×5,000Beginner Tech Notes (Millennium) ×5
  • Lv. 3Credit Points ×7,500Beginner Tech Notes (Millennium) ×8
  • Lv. 4Credit Points ×60,000Normal Tech Notes (Millennium) ×5Beginner Tech Notes (Millennium) ×12Voynich Manuscript Page ×4
  • Lv. 5Credit Points ×90,000Normal Tech Notes (Millennium) ×8Damaged Voynich Manuscript ×4Crystal Haniwa Fragment ×14
  • Lv. 6Credit Points ×300,000Advanced Tech Notes (Millennium) ×5Normal Tech Notes (Millennium) ×12Damaged Voynich Manuscript ×10Crystal Haniwa Fragment ×18
  • Lv. 7Credit Points ×450,000Advanced Tech Notes (Millennium) ×8Annotated Voynich Manuscript ×3Broken Crystal Haniwa ×14
  • Lv. 8Credit Points ×1,500,000Superior Tech Notes (Millennium) ×8Advanced Tech Notes (Millennium) ×12Intact Voynich Manuscript ×4Repaired Crystal Haniwa ×8
  • Lv. 9Credit Points ×2,400,000Superior Tech Notes (Millennium) ×12Intact Voynich Manuscript ×8Repaired Crystal Haniwa ×14
  • Lv. 10Credit Points ×4,000,000Secret Tech Notes ×1

Star promotion

  • 4 starsCredit Points ×200,000Koyuki's Eleph ×100
  • 5 starsCredit Points ×1,000,000Koyuki's Eleph ×120

Exclusive Weapon

  • 2 starsCredit Points ×1,000,000Koyuki's Eleph ×120
  • 3 starsCredit Points ×1,500,000Koyuki's Eleph ×180
  • 4 starsCredit Points ×2,000,000Koyuki's Eleph ×200

Unique Item

  • T2Credit Points ×500,000World's Most Useless Gadget ×4Voynich Manuscript Page ×80Damaged Voynich Manuscript ×25

Talent: Max HP

  • Lv. 1-5Credit Points ×500,000Voynich Manuscript Page ×50Physical Education Workbook ×10
  • Lv. 6-10Credit Points ×500,000Voynich Manuscript Page ×75Physical Education Workbook ×10
  • Lv. 11-15Credit Points ×500,000Voynich Manuscript Page ×100Physical Education Workbook ×10
  • Lv. 16-20Credit Points ×1,000,000Damaged Voynich Manuscript ×30Physical Education Workbook ×20
  • Lv. 21-25Credit Points ×1,000,000Damaged Voynich Manuscript ×40Physical Education Workbook ×20

Talent: ATK

  • Lv. 1-5Credit Points ×500,000Voynich Manuscript Page ×50Shooting Workbook ×10
  • Lv. 6-10Credit Points ×500,000Voynich Manuscript Page ×75Shooting Workbook ×10
  • Lv. 11-15Credit Points ×500,000Voynich Manuscript Page ×100Shooting Workbook ×10
  • Lv. 16-20Credit Points ×1,000,000Damaged Voynich Manuscript ×30Shooting Workbook ×20
  • Lv. 21-25Credit Points ×1,000,000Damaged Voynich Manuscript ×40Shooting Workbook ×20

Talent: Healing

  • Lv. 1-5Credit Points ×500,000Voynich Manuscript Page ×50Hygiene Workbook ×10
  • Lv. 6-10Credit Points ×500,000Voynich Manuscript Page ×75Hygiene Workbook ×10
  • Lv. 11-15Credit Points ×500,000Voynich Manuscript Page ×100Hygiene Workbook ×10
  • Lv. 16-20Credit Points ×1,000,000Damaged Voynich Manuscript ×30Hygiene Workbook ×20
  • Lv. 21-25Credit Points ×1,000,000Damaged Voynich Manuscript ×40Hygiene Workbook ×20

Art

Koyuki key art

More Mystic students

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