Gula of Gluttony

Gula of Gluttony (暴食のグーラ Bōshoku no gūra) is a boss in Succubus Puttel associated with one of the seven deadly sins, specifically gluttony (Gula in Latin).

Strategy
Gula begins the battle by using Deadly Sin: Gluttony, which inflicts a debuff that greatly lowers the damage you do. Fortunately, this can be cured by eating something, and Gula is helpful enough to give you a Gluttony Cake food item as well. Simply eat this on your first turn, then use Ass attacks to defeat Gula.