Takashi Siblings

Kro,Toroki,Doleahxy, and Kage are just characters from a made-up world by Kxge-Kxn

Takashi Siblings are just part of Kxge-Kxn's imagination
Kage means Shadow
Kro is a monster in Summoner's War
Toroki ws just made
Doleahxy is actually a fusion