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Chiaki

Gehenna Academy

Chiaki

★★★

/Sonic/Attacker

Btier

Introduction

Chiaki is a 3-star Sonic student in Blue Archive. Chiaki's role is Attacker. School: Gehenna Academy.

On the Blue Archive tier list Chiaki is B tier, 85th of the 242 students ranked.

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

What Chiaki does

Her EX is one huge hit on a single enemy, up to 2,772%, and her Sub raises her EX damage for 7 seconds every time she casts it. The catch is that the shot can never crit. Every 30 seconds she also boosts her own Sonic Efficiency.

Chiaki in raids

On the raids usage list Chiaki is D tier, 200th of 264: brought by 0.2% of ranked Global players to the last 8 raids, on average.

  • Raid usage0.24%

By raid, newest first

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

Chiaki's banners

All banners
  • 3 November 2026 to 10 November 2026Pick-Up Recruitment
  • 6 January 2026 to 13 January 2026Pick-Up Recruitment
  • 13 May 2025 to 27 May 2025Pick-Up Recruitment

Profile

The bright and cheerful secretary of the "Weekly Pandemonium Society."

One of her greatest interests is publishing her magazine, "Weekly Pandemonium Society." She works hard to spread the news of the Pandemonium Society's activities and, more importantly, Ibuki's cuteness to the student body.

Chiaki's full name is Motomiya Chiaki. Chiaki's birthday is September 22nd, and Chiaki stands 5'6" tall. Chiaki is voiced by 菅野真衣 in Japanese and Kim Yeryeong in Korean. Chiaki's hobby is publishing magazines and making friends. dydldidl drew Chiaki.

Stats

  • Max HP107th27,062
  • ATK70th4,105
  • DEF193rd108
  • Healing167th5,771
  • Accuracy85th713
  • Evasion112th784
  • Crit176th203
  • Crit DMG200%
  • Stability154th1,372
  • Normal Attack Range147th650
  • 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: 2,470Level 90, 3 stars: 22,452Level 90, 5 stars: 27,062
  • ATKLevel 1, 3 stars: 360Level 90, 3 stars: 3,273Level 90, 5 stars: 4,105
  • DEFLevel 1, 3 stars: 19Level 90, 3 stars: 108Level 90, 5 stars: 108
  • HealingLevel 1, 3 stars: 1,677Level 90, 3 stars: 4,693Level 90, 5 stars: 5,771
  • AccuracyLevel 1, 3 stars: 713Level 90, 3 stars: 713Level 90, 5 stars: 713
  • EvasionLevel 1, 3 stars: 784Level 90, 3 stars: 784Level 90, 5 stars: 784
  • 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: 1,372Level 90, 3 stars: 1,372Level 90, 5 stars: 1,372
  • Normal Attack RangeLevel 1, 3 stars: 650Level 90, 3 stars: 650Level 90, 5 stars: 650
  • 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: 15Level 90, 3 stars: 15Level 90, 5 stars: 15
  • 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
Middle
Attack type
Sonic
Armor type
Special
Weapon
Assault rifle
School
Gehenna Academy
Club
Pandemonium Society
Year and age
2nd Year, 16 years old
Equipment slots
Hat, Hairpin, Charm

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

5

  • Is That Really True?

    EX Skill · Cost 6
    Level

    Deals 2772% of ATK as damage to 1 enemy. (This damage does not trigger a Crit.)

  • Look Over Here!

    Basic Skill
    Level

    Increases Sonic Effectiveness by 63.1% (for 25 sec) every 30 sec.

  • Breaking News!

    Enhanced Skill
    Level

    Increases ATK by 26.6%.

  • Breaking News!+

    Enhanced Skill +
    Level

    Increases ATK by 673. Also increases ATK by 26.6%.

    Replaces Breaking News! once Chiaki's Exclusive Weapon reaches 2 stars.

  • What? I'm Honored!

    Sub Skill
    Level

    Increases EX Skill damage by 46.9% when using EX Skills (for 7 sec).

Exclusive Weapon

Upgrade planner

Camera Blitz

Assault rifle

Chiaki's rifle. Its muzzle flash is big and bright due to its modded flash suppressor.

  • 1 starLv. 30: ATK +472, Max HP +2,305
  • 2 starsLv. 40: ATK +590, Max HP +2,882Enhanced Skill becomes Breaking News!+
  • 3 starsLv. 50: ATK +708, Max HP +3,458Urban affinity S to SS
  • 4 starsLv. 60: ATK +826, Max HP +4,035Sonic 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

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

Relationship Rank bonus

  • 5Total bonus: ATK +12
  • 10Total bonus: ATK +32
  • 15Total bonus: ATK +62, Max HP +275
  • 20Total bonus: ATK +97, Max HP +605
  • 25Total bonus: ATK +107, Max HP +660
  • 30Total bonus: ATK +117, Max HP +715
  • 35Total bonus: ATK +132, Max HP +795
  • 40Total bonus: ATK +147, Max HP +875
  • 45Total bonus: ATK +167, Max HP +1,010
  • 50Total bonus: ATK +187, Max HP +1,145

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 Chiaki)

Gifts Chiaki likes

8

Favourites

  • Classical Poetry Anthology

Also liked

  • Streets of Thugs Vol. 1
  • Encyclopedia
  • Extraordinary Cottontail Detective: Case of the Misty Hot Spring Slide
  • Forbidden Love: Its Beauty Lies in Its Illicitness
  • Guns, Charm, and Zeal
  • Hitgirls Gaming Magazine
  • World's Most Useless Gadget

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

Lines and Memorial Lobby

When recruited: Look here! One, two, cheese!

MomoTalk status: "Weekly Pandemonium Society" on call for reports 24/7!

Chiaki's Recollection Lobby
Chiaki's Recollection Lobby

Upgrade costs

Open in the planner

EX Skill

  • Lv. 2Credit Points ×80,000Beginner Tactical Training Blu-ray (Gehenna) ×12Antikythera Mechanism Piece ×15
  • Lv. 3Credit Points ×500,000Normal Tactical Training Blu-ray (Gehenna) ×12Beginner Tactical Training Blu-ray (Gehenna) ×18Broken Antikythera Mechanism ×12Golden Fleece ×32
  • Lv. 4Credit Points ×3,000,000Advanced Tactical Training Blu-ray (Gehenna) ×12Normal Tactical Training Blu-ray (Gehenna) ×18Damaged Antikythera Mechanism ×12Golden Yarn ×29
  • Lv. 5Credit Points ×10,000,000Superior Tactical Training Blu-ray (Gehenna) ×8Advanced Tactical Training Blu-ray (Gehenna) ×18Intact Antikythera Mechanism ×11Golden Wool ×14

Basic, Enhanced and Sub Skills

  • Lv. 2Credit Points ×5,000Beginner Tech Notes (Gehenna) ×5
  • Lv. 3Credit Points ×7,500Beginner Tech Notes (Gehenna) ×8
  • Lv. 4Credit Points ×60,000Normal Tech Notes (Gehenna) ×5Beginner Tech Notes (Gehenna) ×12Antikythera Mechanism Piece ×5
  • Lv. 5Credit Points ×90,000Normal Tech Notes (Gehenna) ×8Broken Antikythera Mechanism ×6Golden Fleece ×13
  • Lv. 6Credit Points ×300,000Advanced Tech Notes (Gehenna) ×5Normal Tech Notes (Gehenna) ×12Broken Antikythera Mechanism ×10Golden Fleece ×14
  • Lv. 7Credit Points ×450,000Advanced Tech Notes (Gehenna) ×8Damaged Antikythera Mechanism ×5Golden Yarn ×14
  • Lv. 8Credit Points ×1,500,000Superior Tech Notes (Gehenna) ×8Advanced Tech Notes (Gehenna) ×12Intact Antikythera Mechanism ×5Golden Wool ×10
  • Lv. 9Credit Points ×2,400,000Superior Tech Notes (Gehenna) ×12Intact Antikythera Mechanism ×7Golden Wool ×13
  • Lv. 10Credit Points ×4,000,000Secret Tech Notes ×1

Star promotion

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

Exclusive Weapon

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

Talent: Max HP

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

Talent: ATK

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

Talent: Healing

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

Art

Chiaki key art

More Sonic students

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