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Rei

Millennium Science School

Rei

★★★

/Sonic/Attacker

Btier

Introduction

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

On the Blue Archive tier list Rei is B tier, 107th of the 242 students ranked.

Other Sonic students in Blue Archive: Aoba, Atsuko (Swimsuit), Chiaki, Eri, Erika, Fuyu and 31 more.

What Rei does

Built for waves of weak enemies: every 4 kills gives her an Attack Speed burst and an Out, and three Outs make her next EX cost up to 3 less. Her EX itself is a modest area hit for up to 401%.

Rei in raids

On the raids usage list Rei is D tier, 218th of 264: brought by 0.2% of ranked Global players to the last 8 raids, on average.

  • Raid usage0.17%

By raid, newest first

  • Hod (Indoor)0.3%
  • Gregorius (Indoor)0%
  • Hovercraft (Outdoor)0.2%
  • Drumbarka (Street)0%
  • Myouki Kurokage (Street)0.3%
  • KAITEN FX Mk.0 (Street)0.1%
  • Perorodzilla (Outdoor)0.5%
  • Goz (Outdoor)0%

Rei's banners

All banners
  • 1 September 2026 to 8 September 2026Pick-Up Recruitment
  • 26 August 2025 to 9 September 2025Pick-Up Recruitment

Profile

Millennium Baseball Club's cleanup hitter.

She has a bold dream of reforming the Millennium Baseball Club, which is better defined as a physics dynamics club than an actual baseball club. Her alliance with Sumire is a strange one, considering Sumire's boundless energy. They do end up having quite a few disagreements when in the game, however.

Rei's full name is Nomasa Rei. Rei's birthday is August 9th, and Rei stands 5'3" tall. Rei is voiced by 稲垣好 in Japanese and Kim Seohyun in Korean. Rei's hobby is watching sports and analyzing records. MISOM150 drew Rei.

Stats

  • Max HP221st20,874
  • ATK3rd8,705
  • DEF150th109
  • Healing179th5,746
  • Accuracy62nd761
  • Evasion204th196
  • Crit176th203
  • Crit DMG200%
  • Stability234th984
  • Normal Attack Range86th850
  • 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: 2,481Level 90, 3 stars: 17,318Level 90, 5 stars: 20,874
  • ATKLevel 1, 3 stars: 763Level 90, 3 stars: 6,941Level 90, 5 stars: 8,705
  • DEFLevel 1, 3 stars: 19Level 90, 3 stars: 109Level 90, 5 stars: 109
  • HealingLevel 1, 3 stars: 1,670Level 90, 3 stars: 4,672Level 90, 5 stars: 5,746
  • AccuracyLevel 1, 3 stars: 761Level 90, 3 stars: 761Level 90, 5 stars: 761
  • EvasionLevel 1, 3 stars: 196Level 90, 3 stars: 196Level 90, 5 stars: 196
  • CritLevel 1, 3 stars: 203Level 90, 3 stars: 203Level 90, 5 stars: 203
  • 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: 984Level 90, 3 stars: 984Level 90, 5 stars: 984
  • Normal Attack RangeLevel 1, 3 stars: 850Level 90, 3 stars: 850Level 90, 5 stars: 850
  • 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: 1Level 90, 3 stars: 1Level 90, 5 stars: 1
  • 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
Sonic
Armor type
Light
Weapon
Rocket launcher
School
Millennium Science School
Club
Athletics Training Club
Year and age
1st Year, 15 years old
Equipment slots
Hat, Hairpin, Watch

Terrain affinity

  • UrbanB
  • OutdoorD
  • IndoorS (SS with the weapon at 3 stars)

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

Skills

5

  • Millennium's Cleanup Hitter!

    EX Skill · Cost 4
    Level

    Deals 401% of ATK as damage to enemies in a circular area.

  • Fine Play

    Basic Skill
    Level

    Increases ATK SPD by 57.3% upon defeating 4 enemies (for 20 sec). Accumulates 1 Out (cooldown: 10 sec).

  • Tomorrow's Slugger

    Enhanced Skill
    Level

    Increases Crit by 26.6%.

  • Tomorrow's Slugger+

    Enhanced Skill +
    Level

    Increases Crit DMG by 3800. Also increases Crit by 26.6%.

    Replaces Tomorrow's Slugger once Rei's Exclusive Weapon reaches 2 stars.

  • Three-Out Change

    Sub Skill
    Level

    Increases Sonic Effectiveness by 65.6%. Decreases EX Skill Cost by 3 upon accumulating 3 Outs. (Max 1 use of EX Skill) (Resets Out count.)

Exclusive Weapon

Upgrade planner

Moon Shot!

Rocket launcher

Rei's recoilless launcher. Its bullets are imbued with her fervent desire to hit a home run. One day, she'll land a hit that makes it to the moon and back.

  • 1 starLv. 30: ATK +1,000, Max HP +1,792
  • 2 starsLv. 40: ATK +1,250, Max HP +2,240Enhanced Skill becomes Tomorrow's Slugger+
  • 3 starsLv. 50: ATK +1,499, Max HP +2,688Indoor affinity S to SS
  • 4 starsLv. 60: ATK +1,750, Max HP +3,136Sonic 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

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

Relationship Rank bonus

  • 5Total bonus: ATK +24
  • 10Total bonus: ATK +69
  • 15Total bonus: ATK +134, Max HP +210
  • 20Total bonus: ATK +209, Max HP +465
  • 25Total bonus: ATK +229, Max HP +505
  • 30Total bonus: ATK +249, Max HP +545
  • 35Total bonus: ATK +279, Max HP +610
  • 40Total bonus: ATK +309, Max HP +675
  • 45Total bonus: ATK +359, Max HP +780
  • 50Total bonus: ATK +409, Max HP +885

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 Rei)

Gifts Rei likes

4

Favourites

  • Airbook Rare
  • A-Pods Pro
  • Buried Treasure Map
  • Gamegirl Color Replica

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

Lines and Memorial Lobby

When recruited: Practice like it's a real game, play like it's practice!

MomoTalk status: First, gonna get that 0.10 batting average!

Rei's Recollection Lobby
Rei's Recollection Lobby

Upgrade costs

Open in the planner

EX Skill

  • Lv. 2Credit Points ×80,000Beginner Tactical Training Blu-ray (Millennium) ×12Totem Pole Piece ×18
  • Lv. 3Credit Points ×500,000Normal Tactical Training Blu-ray (Millennium) ×12Beginner Tactical Training Blu-ray (Millennium) ×18Broken Totem Pole ×16Istanbul Rocket Piece ×34
  • Lv. 4Credit Points ×3,000,000Advanced Tactical Training Blu-ray (Millennium) ×12Normal Tactical Training Blu-ray (Millennium) ×18Repaired Totem Pole ×9Broken Istanbul Rocket ×25
  • Lv. 5Credit Points ×10,000,000Superior Tactical Training Blu-ray (Millennium) ×8Advanced Tactical Training Blu-ray (Millennium) ×18Intact Totem Pole ×10Repaired Istanbul Rocket ×19

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) ×12Totem Pole Piece ×4
  • Lv. 5Credit Points ×90,000Normal Tech Notes (Millennium) ×8Broken Totem Pole ×6Istanbul Rocket Piece ×14
  • Lv. 6Credit Points ×300,000Advanced Tech Notes (Millennium) ×5Normal Tech Notes (Millennium) ×12Broken Totem Pole ×8Istanbul Rocket Piece ×18
  • Lv. 7Credit Points ×450,000Advanced Tech Notes (Millennium) ×8Repaired Totem Pole ×4Broken Istanbul Rocket ×18
  • Lv. 8Credit Points ×1,500,000Superior Tech Notes (Millennium) ×8Advanced Tech Notes (Millennium) ×12Intact Totem Pole ×5Repaired Istanbul Rocket ×10
  • Lv. 9Credit Points ×2,400,000Superior Tech Notes (Millennium) ×12Intact Totem Pole ×7Repaired Istanbul Rocket ×13
  • Lv. 10Credit Points ×4,000,000Secret Tech Notes ×1

Star promotion

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

Exclusive Weapon

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

Talent: Max HP

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

Talent: ATK

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

Talent: Healing

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

Art

Rei key art

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