[Joy of Invention] Mei Hatsume
UR INT

Joy of Invention

Mei Hatsume

Stats

Lv. 1

Freshly recruited

HP
5,200
Power
747
Speed
110
Defense
100
Crit Rate
10%
Battle Power
5,588

Lv. 80

Basic + Piece Route board

HP
34,600
Power
6,027
Speed
539
Defense
100
Crit Rate
10%
Battle Power
41,408

Max Lv.

Lv. 130

Full board incl. DX

HP
46,000
Power
8,507
Speed
729
Defense
100
Crit Rate
10%
Battle Power
57,028

ADV+

Lv. 130

Max Lv. + Advanced Lv Up

HP
55,000
Power
10,307
Speed
909
Defense
100
Crit Rate
10%
Battle Power
68,728

Level cap: 80 → 100 with the Piece Route → 130 with the DX Piece Route.

How the ADV+ build adds up
HPPowerSpeed
Level growth (Lv. 130)20,5003,807299
Basic + Piece Route+21,500+3,700+350
DX Piece Route+4,000+1,000+80
Advanced Lv Up ×90+9,000+1,800+180
Trust Lv. 20+500+100+10
Total 55,000 10,307 909

Trust Lv. 20 adds HP +500, Power +100, Speed +10 and Crit +3% to every card of this character (Max Lv. and ADV+ columns). Battle Power never includes Trust.

Battle Power = (HP × Defense ÷ 100 + Power × 8) ÷ 2, as the game computes it (EX Auto Skills not included).

Skills

Plus Ultra Move

Leave it to My Babies! Lv.3

Deals 450% damage to all opponents and makes them blind for 3 turns. Reduces cooldown time of all allies by 1.
▼Enhancement Bonus Effects
Restores all allies' damage taken by 20% for 3 turns.

Action Skill 1

Captured! DX Lv.2

Cooldown Time: 4 turn(s)

Deals 400% damage to a single opponent and decreases a single opponent's defense by 30% for 3 turns with a medium chance (40%) of binding them for 2 turns.
Reduces the effective time of all allies' temporary status ailments by 3 turn(s).
▼Enhancement Bonus Effects
Increases this skill's status ailment hit rate.

Action Skill 2

Charge! DX Lv.2

Cooldown Time: 4 turn(s)

Deals 300% damage to all opponents.
Increases Plus Ultra Gauge of all allies by 30%, Max HP of all allies by 30% for 3 turns, and restores all allies' damage taken by 30% for 3 turns.

Locked at first — unlocked on the Basic Route.

Auto Skill 1

Supporting My Babies Lv.3

Gives character Enhance when these 2 conditions are met at the end of a turn [(1) After a turn passes while character is making a last stand; (2) After 3 turns pass from the start of battle]
Increases Max HP of all allies by 25% and power of all allies by 25%, and gives them immunity to stun.
Gives all allies the ability to make a last stand 3 times, every 3 turns, up to 2 times.

Enhance Buffs

  • Base Attack Power UP +140
  • Base Speed UP +58
  • Base Max HP UP +6,900

Auto Skill 2

The Inventor Lv.3

Increases cooldown time of all opponents and allies by 1 for 1 turn, up to 1 time. *This effect cannot be nullified, restricted, or canceled, and does not affect guests.
Reduces the effective time of character's temporary status ailments by 1 turn(s) when an ally (excl. character) receives Cooldown Time Extension 1 time.
Reduces the effective time of all allies' (excl. character) temporary status ailments by 1 turn(s) when character receives Cooldown Time Extension 1 time.
When an opponent receives Cooldown Time Reduction 1 time, reduces damage to all allies by 20% for 3 turns and increases critical hit rate of all allies by 10%, up to 5 times.
Increases power of all allies by 20% when opponents receive Cooldown Time Reduction 2 times, up to 3 times.
Decreases skill impact of all opponents by 10% when an opponent receives Cooldown Time Reduction 1 time, up to 5 times.
Decreases Plus Ultra Move skill impact of all opponents by 20% when opponents receive Cooldown Time Reduction 2 times, up to 3 times.
▼Enhancement Bonus Effects
Ignores target with a medium chance (50%) of blocking a random single opponent's buffs for 2 turns when an opponent receives Cooldown Time Reduction 1 time.

Locked at first — unlocked on the Piece Route.

Percentages after “chance” are the effect's success rate from the game data.

Unique EX Auto Skills

Unlocked on the DX Piece Route. Each draw costs 20 of this card's Pieces and picks one at random from this character's pool (14.29% each); you can draw again, which replaces the current skill.

  1. Gives character ability to land a bullseye for 3 turns, up to 1 time.
    BP+2,300
  2. Increases power of all ally U.A. High students by 10%.
    BP+2,300
  3. Increases critical hit rate of all allies (excl. character) by 5% every 1 turn, up to 6 times.
    BP+2,300
  4. Increases defense of all allies by 20% for 3 turns when battle starts.
    BP+2,300
  5. Increases character's defense by 5% per turn, up to 6 times.
    BP+2,300
  6. Reduces damage to character by 15% for 2 turns after receiving 2 attacks from an opponent with higher power (multi hit attacks=1 attack).
    BP+2,300
  7. Once per battle, when HP is below 50%, increases Plus Ultra Gauge of all allies by 20% and increases their Plus Ultra Move skill impact by 20% for 3 turns.
    BP+2,300

Ability Board

Basic Route

Enhance and Awaken your character.

117 squares

HP
+17,500
Power
+2,700
Speed
+280
  • Awakening
  • 13 skill upgrades
  • 2,622,000
  • Materials5,907
  • 50

Piece Route

Enhance Skills and raise character Lv Limit.

9 squares

HP
+4,000
Power
+1,000
Speed
+70
  • Lv. cap 80 → 100
  • 3 skill upgrades
  • 450

DX Piece Route

Unlock Advanced Lv Up levels and Unique EX Auto Skills.

9 squares

HP
+4,000
Power
+1,000
Speed
+80
  • Lv. cap 100 → 130
  • Advanced Lv Up cap 50 → 90
  • Unique EX Auto Skill
  • 400
  • 3
All materials (full board) 100
  • ×2,622,000 Coin
  • ×900 [Joy of Invention] Hatsume Piece Basic 50 · Piece 450 · DX 400
  • ×3 [Joy of Invention] Hatsume DX Piece
  • ×9 Hold On! Health Pack (Small)
  • ×15 Hold On! Health Can (Small)
  • ×49 Hold On! Health Bottle (Small)
  • ×35 Hold On! Health Ball (Small)
  • ×72 Hold On! Health Weights (Small)
  • ×73 Hold On! Health Pack (Medium)
  • ×95 Hold On! Health Can (Medium)
  • ×100 Hold On! Health Bottle (Medium)
  • ×25 Hold On! Health Ball (Medium)
  • ×35 Hold On! Health Weights (Medium)
  • ×38 Hold On! Health Timer (Medium)
  • ×100 Hold On! Health Pack (Large)
  • ×100 Hold On! Health Can (Large)
  • ×85 Hold On! Health Bottle (Large)
  • ×100 Hold On! Health Ball (Large)
  • ×60 Hold On! Health Weights (Large)
  • ×40 Hold On! Health Timer (Large)
  • ×9 MAX Power! Pack (Small)
  • ×15 MAX Power! Can (Small)
  • ×49 MAX Power! Bottle (Small)
  • ×36 MAX Power! Weights (Small)
  • ×73 MAX Power! Pack (Medium)
  • ×95 MAX Power! Can (Medium)
  • ×100 MAX Power! Bottle (Medium)
  • ×35 MAX Power! Weights (Medium)
  • ×100 MAX Power! Pack (Large)
  • ×100 MAX Power! Can (Large)
  • ×85 MAX Power! Bottle (Large)
  • ×40 MAX Power! Ball (Large)
  • ×40 MAX Power! Timer (Large)
  • ×9 Extreme Speed! Pack (Small)
  • ×15 Extreme Speed! Can (Small)
  • ×49 Extreme Speed! Bottle (Small)
  • ×40 Extreme Speed! Ball (Small)
  • ×73 Extreme Speed! Pack (Medium)
  • ×95 Extreme Speed! Can (Medium)
  • ×100 Extreme Speed! Bottle (Medium)
  • ×50 Extreme Speed! Ball (Medium)
  • ×35 Extreme Speed! Weights (Medium)
  • ×76 Extreme Speed! Timer (Medium)
  • ×100 Extreme Speed! Pack (Large)
  • ×100 Extreme Speed! Can (Large)
  • ×40 Extreme Speed! Bottle (Large)
  • ×70 Extreme Speed! Ball (Large)
  • ×30 Extreme Speed! Weights (Large)
  • ×40 Extreme Speed! Timer (Large)
  • ×1 Brilliant Bronze Plaque
  • ×2 Brilliant Bronze Trophy
  • ×3 Brilliant Bronze Cup
  • ×5 Brilliant Bronze Award
  • ×5 Brilliant Bronze Flag
  • ×10 Superb Silver Plaque
  • ×10 Superb Silver Trophy
  • ×10 Superb Silver Cup
  • ×15 Superb Silver Award
  • ×15 Superb Silver Flag
  • ×10 Supreme Golden Plaque
  • ×10 Supreme Golden Trophy
  • ×10 Supreme Golden Cup
  • ×20 Supreme Golden Award
  • ×20 Supreme Golden Flag
  • ×7 Small Gear (INT)
  • ×5 Small Ring (INT)
  • ×11 Small Chip (INT)
  • ×100 Small Screw (INT)
  • ×102 Small Nut (INT)
  • ×44 Small Pipe (INT)
  • ×109 Medium Gears (INT)
  • ×143 Medium Rings (INT)
  • ×163 Medium Chip (INT)
  • ×24 Medium Screw (INT)
  • ×60 Medium Nut (INT)
  • ×30 Medium Pipe (INT)
  • ×105 Intricate Gears (INT)
  • ×100 Intricate Rings (INT)
  • ×80 Intricate Chip (INT)
  • ×75 Complex Screw (INT)
  • ×81 Complex Nut (INT)
  • ×75 Complex Pipe (INT)
  • ×12 Tiny Light (INT)
  • ×31 Tiny Cylinder (INT)
  • ×32 Tiny Battery (INT)
  • ×45 Tiny Capacitor (INT)
  • ×102 Tiny Fan (INT)
  • ×20 Tiny Memory Drive (INT)
  • ×172 Medium Light (INT)
  • ×180 Medium Cylinder (INT)
  • ×175 Medium Battery (INT)
  • ×45 Medium Capacitor (INT)
  • ×75 Medium Fan (INT)
  • ×70 Medium Memory Drive (INT)
  • ×110 Charged-up Light (INT)
  • ×238 Charged-up Cylinder (INT)
  • ×140 Charged-up Battery (INT)
  • ×60 Powerful Capacitor (INT)
  • ×140 Powerful Fan (INT)
  • ×70 Powerful Memory Drive (INT)
  • UR Unlocking Orb αUnlocking Orbs (panels 1–6)
  • UR Unlocking Orb βUnlocking Orbs (panels 7–9)
  • UR Unlocking Orb γUnlocking Orbs (panels 10–13)

Event Bonuses

1

Character Stories

1
  • Holiday Story - "Mei Hatsume's Day Off"

    Unlocked at Trust Lv. 10 · Added Dec 17, 2025

    Read the story (35 lines)
    1. A few days before the U.A. School Festival.

    2. Mei Hatsume

      Hehehe... It's really coming together!

    3. Mei Hatsume

      But there's still a lot to do. This is a chance for companies to really look at my work.

    4. Mei Hatsume

      I need to raise these little babies to shine brightly!

    5. Mei Hatsume

      Next part... Huh? I feel a little dizzy. What's happening?

    6. Mei Hatsume

      Ah! Now's my chance to test a baby that can correct balance! Let's get to work...

    7. Power Loader

      Don't be ridiculous. Eat a proper meal before you start testing items.

    8. Mei Hatsume

      Meal? Ah! You're right, I forgot to eat!

    9. Power Loader

      You... How many times have I told you not to work so hard you forget to eat?

    10. Power Loader

      Please go to the cafeteria and eat a meal. Then go to the Nurse's Office and take a nap!

    11. Power Loader

      You make all sorts of mistakes when you're not well!

    12. Mei Hatsume

      But there are so many tweaks I want to make...

    13. Power Loader

      Right now, you need food and rest! Go on now! Go!

    14. Mei Hatsume

      I got pushed out...

    15. Mei Hatsume

      I guess I don't have a choice. I should do what Mr. Power Loader said.

    16. Mei Hatsume

      I assured them my babies would really light up the stage. I better start the improvements.

    17. Mei Hatsume

      How do I get fire to come out... If I redesign this... A pillar of fire will burst out right on time!

    18. Mei Hatsume

      Done with the repairs on the broken megaphone used to attract people.

    19. Mei Hatsume

      But it doesn't stand out at all. I need to paint it a flashy color.

    20. Mei Hatsume

      Putting in a voice player will make it easier to gather attention!

    21. Power Loader

      I thought you came back in high spirits, but what is that?!

    22. Power Loader

      Is this what you call taking a rest?!

    23. Mei Hatsume

      Ah, Mr. Power Loader! This is a device to liven up the stage.

    24. Mei Hatsume

      Some people are uneasy about the performance, so I'll have them use this baby!

    25. Mei Hatsume

      What do you think of this pillar of fire? Silver tape shoots out from here! It's so convenient!

    26. Power Loader

      Uh... That didn't answer my question.

    27. Mei Hatsume

      I repaired this broken device used to gather attention.

    28. Mei Hatsume

      I attached other convenient features to make it a wonderful baby!

    29. Power Loader

      Please listen to me...

    30. Mei Hatsume

      Ah, but I need to do something with this part... I got a great idea!

    31. Mei Hatsume

      I can improve it and create a baby I can really be proud of!

    32. Mei Hatsume

      Of course, I'll put the finishing touches on the babies I'll present. Don't worry, I won't miss any details!

    33. Power Loader

      That's not the issue I'm worried about!

    34. Power Loader

      I told you to take a rest... How did you manage to find MORE work?!

    35. Power Loader

      Sheesh... That's Hatsume for you...

[Joy of Invention] Mei Hatsume
[Joy of Invention] Mei Hatsume