Blue Archive · student

Yuuka

Yuukaユウカ유우카

★★◉Explosion HeavyArmor ◆Tanker Striker Millennium Front SMG Standard

Unchanged since July 18, 2026

LV.90

Combat

UrbanBOutdoorBIndoorA

Stats · Lv.90 Stats at any level →

HP47,609

ATK1,084

DEF164

Heal4,213

Crit200

Crit DMG200%

Crit RES100

Stability1,396

Accuracy100

Evasion1,440

Range350

DEF Pen0

CC Power100

CC RES100

Ammo27

Ammo cost3

Move Speed200

Heal Effectiveness10,000

Skills

Q.E.D.EX Skill · Cost 3 · Lv.5

Casts 248% of Healing as a barrier (for 25 sec).

Drag to see per-level scaling

I.F.F+Basic Skill · Lv.10

Deals 625% of ATK as damage to 1 enemy every 15 sec. Increases the user's Evasion by 33.8% (for 10 sec).

Drag to see per-level scaling

Optimal Solution+Enhanced Skill · Lv.10

Increases Cover Success Rate by 1900. Also increases DEF by 26.6%.

Drag to see per-level scaling

Speedy Mental CalculationsSub Skill · 10000s CD · Lv.10

When taking cover, recovers 142% of Healing as HP (cooldown: 10 sec).

Drag to see per-level scaling

Loved gifts · raise this student's affinity the most

Airbook RareSSRNutrient-Packed Multivitamin GummiesSSRBrain Teaser Puzzle CubeSR

Exclusive gear

Yuuka's Scientific CalculatorT1 · Bond 15 · DEF +500Yuuka's Scientific CalculatorT2 · Bond 20 · Basic skill upgrade

Star levels · credits and Eleph per star

2★

10,000 Credit Points + 30x Yuuka's Eleph

3★

40,000 Credit Points + 80x Yuuka's Eleph

4★

200,000 Credit Points + 100x Yuuka's Eleph

5★

1,000,000 Credit Points + 120x Yuuka's Eleph

Skill levels · per skill slot, per level

EX skill Lv.1 → 2

80,000 Credit Points + 12x Beginner Tactical Training Blu-ray (Millennium) + 12x Nimrud Lens Piece

Basic / Enhanced / Sub skill Lv.1 → 2

5,000 Credit Points + 5x Beginner Tech Notes (Millennium)

EX skill Lv.2 → 3

500,000 Credit Points + 12x Normal Tactical Training Blu-ray (Millennium) + 18x Beginner Tactical Training Blu-ray (Millennium) + 11x Broken Nimrud Lens + 33x Antikythera Mechanism Piece

Basic / Enhanced / Sub skill Lv.2 → 3

7,500 Credit Points + 8x Beginner Tech Notes (Millennium)

EX skill Lv.3 → 4

3,000,000 Credit Points + 12x Advanced Tactical Training Blu-ray (Millennium) + 18x Normal Tactical Training Blu-ray (Millennium) + 10x Damaged Nimrud Lens + 27x Broken Antikythera Mechanism

Basic / Enhanced / Sub skill Lv.3 → 4

60,000 Credit Points + 5x Normal Tech Notes (Millennium) + 12x Beginner Tech Notes (Millennium) + 4x Nimrud Lens Piece

EX skill Lv.4 → 5

10,000,000 Credit Points + 8x Superior Tactical Training Blu-ray (Millennium) + 18x Advanced Tactical Training Blu-ray (Millennium) + 9x Intact Nimrud Lens + 20x Damaged Antikythera Mechanism

Basic / Enhanced / Sub skill Lv.4 → 5

90,000 Credit Points + 8x Normal Tech Notes (Millennium) + 5x Broken Nimrud Lens + 10x Antikythera Mechanism Piece

Basic / Enhanced / Sub skill Lv.5 → 6

300,000 Credit Points + 5x Advanced Tech Notes (Millennium) + 12x Normal Tech Notes (Millennium) + 11x Broken Nimrud Lens + 20x Antikythera Mechanism Piece

Basic / Enhanced / Sub skill Lv.6 → 7

450,000 Credit Points + 8x Advanced Tech Notes (Millennium) + 2x Damaged Nimrud Lens + 15x Broken Antikythera Mechanism

Basic / Enhanced / Sub skill Lv.7 → 8

1,500,000 Credit Points + 8x Superior Tech Notes (Millennium) + 12x Advanced Tech Notes (Millennium) + 4x Intact Nimrud Lens + 7x Damaged Antikythera Mechanism

Basic / Enhanced / Sub skill Lv.8 → 9

2,400,000 Credit Points + 12x Superior Tech Notes (Millennium) + 7x Intact Nimrud Lens + 13x Damaged Antikythera Mechanism

Basic / Enhanced / Sub skill Lv.9 → 10

4,000,000 Credit Points + 1x Secret Tech Notes

Weapon stars · cost per unique-weapon star

Unique weapon 2★

1,000,000 Credit Points + 120x Yuuka's Eleph

Unique weapon 3★

1,500,000 Credit Points + 180x Yuuka's Eleph

Unique weapon 4★

2,000,000 Credit Points + 200x Yuuka's Eleph

Unique weapon 5★

2,500,000 Credit Points + 1x Yuuka's Eleph

Gear tiers · cost per tier

Gear T1

500,000 Credit Points + 4x Brain Teaser Puzzle Cube + 80x Antikythera Mechanism Piece + 25x Broken Antikythera Mechanism

Unique Weapon

Logic & ReasonATK +273 · HP +8131 · Heal +943

A pair of machine guns used by Yuuka. They help Yuuka make rational and intelligent decisions.

Transcendence · per-star stat bonuses

★★ATK +10.0% HP +5.0% Heal +7.5%★★★ATK +22.0% HP +12.0% Heal +17.5%★★★★ATK +36.0% HP +21.0% Heal +29.5%★★★★★ATK +53.0% HP +35.0% Heal +44.5%

Bond bonuses · max affinity

HP+3310DEF+60

Equipment slots

ShoesBadgeCharm

Profile

Full nameHayase Yuuka

Age16 years old

BirthdayMarch 14th

Height5'1"

School year2nd Year

IllustratorHwansang

Voice actor春花らん

HobbyDoing calculations

MottoJust as I calculated...

The treasurer of Seminar, the student council of Millennium Science School. Yuuka has a mathematical acumen that is notable even among Millennium's high ratio of STEM students. She oversees the entirety of Millennium's budget. Her special talent is the abacus, and she has a habit of fiddling with the beads when dealing with emotional or mental conflicts.