Ermes Costello was obtainable for a limited time as a collaboration character in the mobile game Monster Strike.
Ermes Costello
エルメェス・コステロ
エルメェス・コステロ
Sling Type: Bounce
Element: 
Rarity: 4★
No. 6409 
HP
8,647 (+1,400)
ATK
12,878 (+625)
SPD
270.30 (+13.60)
Ability
Null Gravity Barrier
Strike Shot: "This is my problem, I can handle it by myself!"
Increases Speed. (12 Turns)
Bump Combo
Time Bullet (Power: 59765)
Jolyne's Best Friend, Ermes Costello
徐倫の親友 エルメェス・コステロ
徐倫の親友 エルメェス・コステロ
Sling Type: Bounce
Element:
Rarity: 5★ (Evolution)
No. 6410 
HP
14,986 (+1,400)
ATK
15,235 (+1,500)
SPD
302.57 (+29.75)
Race
Demi-Human
Obtain
Evolution
Ability
Super Null Gravity Barrier / Null Damage Wall / Regen
Strike Shot: "Kiss"
Splits into two clones + Move around the battlefield and take damage when the clones merge back into one after movement. (8 Turns)
Bump Combo
Super Time Bullet (251018)
Female Prisoner Trio, Jolyne, Ermes & F.F.
女囚3人組 徐倫＆エルメェス＆F・F
女囚3人組 徐倫＆エルメェス＆F・F
Sling Type: Bounce
Element: 
Rarity: 6★
No. 6432 
HP
18,174 (+3,900)
ATK
16,399 (+5,625)
SPD
327.50 (+102.85)
Ability
Null Damage Wall / Laser Stop / Null Warp / Multi-Hit Slayer
Strike Shot: "This game of catch isn't over yet!"
Splits into three clones + Attack the first contacted enemy with Stone Free and a ball. (20 Turns)
Bump Combo
Homing Pierce-struction 12 (Power: 3345)