Soul of a Hero
英雄の精神 [eiyuu no seishin] or 'mind/soul of a hero' in Japanese.
Pictlogica

Obtain: Wednesday weekday quest, various quests
Use: required for EX Fusion of premium and event characters
Type: Grade Up Material, Rarity: ★★★★★
Description: Material for EX Fusion and EX Alchemy synthesization
Category: Item