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Yuuka (Pajamas)

Millennium Science School

Yuuka (Pajamas)

★★★

/Explosive/Tank

Atier

Introduction

Yuuka (Pajamas) is a 3-star Explosive student in Blue Archive. Yuuka (Pajamas)'s role is Tank. School: Millennium Science School.

On the Blue Archive tier list Yuuka (Pajamas) is A tier, 60th of the 242 students ranked.

Other Explosive students in Blue Archive: Airi, Airi (Band), Akane (School), Akari, Ako (Dress), Aru and 85 more.

What Yuuka (Pajamas) does

A tank that also debuffs: her EX hits one enemy for up to 887% and lowers its Defense, double against Light armor. She heals herself every 30 seconds and gains a Defense stack each time she's healed, up to seven.

Yuuka (Pajamas) in raids

On the raids usage list Yuuka (Pajamas) is D tier, 158th of 264: brought by 0.5% of ranked Global players to the last 8 raids, on average.

  • Raid usage0.51%

By raid, newest first

  • Hod (Indoor)0.7%
  • Gregorius (Indoor)0.7%
  • Hovercraft (Outdoor)0.4%
  • Drumbarka (Street)0.1%
  • Myouki Kurokage (Street)0.5%
  • KAITEN FX Mk.0 (Street)0.9%
  • Perorodzilla (Outdoor)0.7%
  • Goz (Outdoor)0.1%

Yuuka (Pajamas)'s banners

All banners
  • 14 July 2026 to 21 July 2026Pick-Up Recruitment
  • 10 June 2025 to 24 June 2025Pick-Up Recruitment

Profile

Seminar's accountant, sporting her pajamas to enjoy a leisurely rest. She always performs her duties perfectly and on time. However, constant issues at school, in conjunction with her chronic insomnia, has made it difficult for her to get rest. She's equipped herself with a fluffy pillow and soft, well-fitted pajamas to achieve the perfect rest, but the mischievous members of Millennium, who seem to have little regard for daytime or nighttime, seem determined to disturb her peace.

Yuuka (Pajamas)'s full name is Hayase Yuuka. Yuuka (Pajamas)'s birthday is March 14th, and Yuuka (Pajamas) stands 5'1" tall. Yuuka (Pajamas) is voiced by 春花らん in Japanese and Shin Nari in Korean. Yuuka (Pajamas)'s hobby is doing calculations. Paruru drew Yuuka (Pajamas).

Stats

  • Max HP22nd48,145
  • ATK220th2,384
  • DEF8th936
  • Healing256th4,771
  • Accuracy209th105
  • Evasion151st227
  • Crit135th210
  • Crit DMG200%
  • Stability176th1,324
  • Normal Attack Range223rd450
  • 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: 3,179Level 90, 3 stars: 39,942Level 90, 5 stars: 48,145
  • ATKLevel 1, 3 stars: 209Level 90, 3 stars: 1,901Level 90, 5 stars: 2,384
  • DEFLevel 1, 3 stars: 170Level 90, 3 stars: 936Level 90, 5 stars: 936
  • HealingLevel 1, 3 stars: 1,387Level 90, 3 stars: 3,880Level 90, 5 stars: 4,771
  • AccuracyLevel 1, 3 stars: 105Level 90, 3 stars: 105Level 90, 5 stars: 105
  • EvasionLevel 1, 3 stars: 227Level 90, 3 stars: 227Level 90, 5 stars: 227
  • CritLevel 1, 3 stars: 210Level 90, 3 stars: 210Level 90, 5 stars: 210
  • 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: 1,324Level 90, 3 stars: 1,324Level 90, 5 stars: 1,324
  • Normal Attack RangeLevel 1, 3 stars: 450Level 90, 3 stars: 450Level 90, 5 stars: 450
  • 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: 27Level 90, 3 stars: 27Level 90, 5 stars: 27
  • 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
Front
Attack type
Explosive
Armor type
Heavy
Weapon
Submachine gun
School
Millennium Science School
Club
Seminar
Year and age
2nd Year, 16 years old
Equipment slots
Shoes, Bag, Necklace

Terrain affinity

  • UrbanD
  • OutdoorS (SS with the weapon at 3 stars)
  • IndoorB

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

Skills

5

  • Peroro in a Pinch

    EX Skill · Cost 2
    Level

    Deals 887% of ATK as damage to 1 enemy. Decreases the enemy's DEF by 23.3% (for 25 sec). If the target's defense type is Light Armor, decreases DEF by 46.7% (for 25 sec).

  • Bedtime Routine

    Basic Skill
    Level

    Recovers 115% of Healing as HP every 30 sec.

  • Sweet Slumber

    Enhanced Skill
    Level

    Increases Max HP by 26.6%.

  • Sweet Slumber+

    Enhanced Skill +
    Level

    Increases Debuff Retention by 1900 and Max HP by 26.6%.

    Replaces Sweet Slumber once Yuuka (Pajamas)'s Exclusive Weapon reaches 2 stars.

  • Still Groggy

    Sub Skill
    Level

    Increases DEF by 6.7% when receiving a Recovery effect (for 30 sec) (max 7 times).

Exclusive Weapon

Upgrade planner

Logic & Reason

Submachine gun

Two submachine guns belonging to Yuuka. Even these two firearms, representing her logic and reason, are not able to chase away her chronic insomnia.

  • 1 starLv. 30: ATK +274, Max HP +4,073, Healing +505
  • 2 starsLv. 40: ATK +342, Max HP +5,091, Healing +631Enhanced Skill becomes Sweet Slumber+
  • 3 starsLv. 50: ATK +411, Max HP +6,109, Healing +757Outdoor affinity S to SS
  • 4 starsLv. 60: ATK +479, Max HP +7,128, Healing +883Explosive damage +10%

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

Yuuka (Pajamas) starts at 3 stars. Each star also lifts the Relationship Rank cap.

Relationship Rank bonus

  • 5Total bonus: Max HP +156
  • 10Total bonus: Max HP +451
  • 15Total bonus: Max HP +846, ATK +20
  • 20Total bonus: Max HP +1,336, ATK +45
  • 25Total bonus: Max HP +1,456, ATK +50
  • 30Total bonus: Max HP +1,576, ATK +55
  • 35Total bonus: Max HP +1,756, ATK +60
  • 40Total bonus: Max HP +1,936, ATK +65
  • 45Total bonus: Max HP +2,236, ATK +75
  • 50Total bonus: Max HP +2,536, ATK +85

Stats stop growing at rank 50.

Talents

  • Max HP25 levels, up to +5%
  • ATK25 levels, up to +5%
  • Healing25 levels, up to +5%

Gifts Yuuka (Pajamas) likes

10

Favourites

  • Airbook Rare
  • Lace Pillow
  • Samuela "The Beyond"
  • A-Pods Pro
  • Cherry-Rose Lip Gloss
  • Gamegirl Color Replica
  • Glassy Glow BB Cream
  • Jellies Cushion
  • Military Camo Foundation Trio
  • Wavecat Pillow

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

Lines and Memorial Lobby

When recruited: An excellent accountant is always ready for a good night's sleep!

MomoTalk status: I can't sleep...

Yuuka (Pajamas)'s Recollection Lobby
Yuuka (Pajamas)'s Recollection Lobby

Upgrade costs

Open in the planner

EX Skill

  • Lv. 2Credit Points ×80,000Beginner Tactical Training Blu-ray (Millennium) ×12Nimrud Lens Piece ×14
  • Lv. 3Credit Points ×500,000Normal Tactical Training Blu-ray (Millennium) ×12Beginner Tactical Training Blu-ray (Millennium) ×18Broken Nimrud Lens ×11Ancient Battery Piece ×30
  • Lv. 4Credit Points ×3,000,000Advanced Tactical Training Blu-ray (Millennium) ×12Normal Tactical Training Blu-ray (Millennium) ×18Damaged Nimrud Lens ×10Broken Ancient Battery ×21
  • Lv. 5Credit Points ×10,000,000Superior Tactical Training Blu-ray (Millennium) ×8Advanced Tactical Training Blu-ray (Millennium) ×18Intact Nimrud Lens ×10Damaged Ancient Battery ×18

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) ×12Nimrud Lens Piece ×7
  • Lv. 5Credit Points ×90,000Normal Tech Notes (Millennium) ×8Broken Nimrud Lens ×7Ancient Battery Piece ×15
  • Lv. 6Credit Points ×300,000Advanced Tech Notes (Millennium) ×5Normal Tech Notes (Millennium) ×12Broken Nimrud Lens ×8Ancient Battery Piece ×15
  • Lv. 7Credit Points ×450,000Advanced Tech Notes (Millennium) ×8Damaged Nimrud Lens ×3Broken Ancient Battery ×16
  • Lv. 8Credit Points ×1,500,000Superior Tech Notes (Millennium) ×8Advanced Tech Notes (Millennium) ×12Intact Nimrud Lens ×4Damaged Ancient Battery ×12
  • Lv. 9Credit Points ×2,400,000Superior Tech Notes (Millennium) ×12Intact Nimrud Lens ×8Damaged Ancient Battery ×13
  • Lv. 10Credit Points ×4,000,000Secret Tech Notes ×1

Star promotion

  • 4 starsCredit Points ×200,000Yuuka (Pajamas)'s Eleph ×100
  • 5 starsCredit Points ×1,000,000Yuuka (Pajamas)'s Eleph ×120

Exclusive Weapon

  • 2 starsCredit Points ×1,000,000Yuuka (Pajamas)'s Eleph ×120
  • 3 starsCredit Points ×1,500,000Yuuka (Pajamas)'s Eleph ×180
  • 4 starsCredit Points ×2,000,000Yuuka (Pajamas)'s Eleph ×200

Talent: Max HP

  • Lv. 1-5Credit Points ×500,000Nimrud Lens Piece ×50Physical Education Workbook ×10
  • Lv. 6-10Credit Points ×500,000Nimrud Lens Piece ×75Physical Education Workbook ×10
  • Lv. 11-15Credit Points ×500,000Nimrud Lens Piece ×100Physical Education Workbook ×10
  • Lv. 16-20Credit Points ×1,000,000Broken Nimrud Lens ×30Physical Education Workbook ×20
  • Lv. 21-25Credit Points ×1,000,000Broken Nimrud Lens ×40Physical Education Workbook ×20

Talent: ATK

  • Lv. 1-5Credit Points ×500,000Nimrud Lens Piece ×50Shooting Workbook ×10
  • Lv. 6-10Credit Points ×500,000Nimrud Lens Piece ×75Shooting Workbook ×10
  • Lv. 11-15Credit Points ×500,000Nimrud Lens Piece ×100Shooting Workbook ×10
  • Lv. 16-20Credit Points ×1,000,000Broken Nimrud Lens ×30Shooting Workbook ×20
  • Lv. 21-25Credit Points ×1,000,000Broken Nimrud Lens ×40Shooting Workbook ×20

Talent: Healing

  • Lv. 1-5Credit Points ×500,000Nimrud Lens Piece ×50Hygiene Workbook ×10
  • Lv. 6-10Credit Points ×500,000Nimrud Lens Piece ×75Hygiene Workbook ×10
  • Lv. 11-15Credit Points ×500,000Nimrud Lens Piece ×100Hygiene Workbook ×10
  • Lv. 16-20Credit Points ×1,000,000Broken Nimrud Lens ×30Hygiene Workbook ×20
  • Lv. 21-25Credit Points ×1,000,000Broken Nimrud Lens ×40Hygiene Workbook ×20

Art

Yuuka (Pajamas) key art

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