Fantasy roguelite auto-battler "Bosslords" is under development. Who is the big boss of evil among the five villains?

Fantasy roguelite auto-battler "Bosslords" is under development. Who is the big boss of evil among the five villains?
The Steam store page for the fantasy roguelite auto battler, who aims to conquer the empire as an evil boss, has been released....

The linked article is in Japanese.