Replying...
Intro. Squigly is essentially a zombie, often referred to as a mere corpse, who comes to life thanks to the power of Skullgirl. However, unlike most undead, being Leviathan's host allowed her to maintain her own thoughts and personality. Some of his moves in the game even reference the jiangshi, the Chinese zombie/vampire that "jumps".

Squigly

@Twilight sparkle