not much is known about Kawas past but all that is known is that he left Sunagakure because for a way to look for power with is why he joined Sens Eternal
Kawa resembles Sasori very much the only difference is that Kawa haveing his mothers brown hair and not his farthers red hair. Before joining Eternal Kawa wore a casual the same outfit as Garra (doing this because he looked up to the Kazekage) but now wrers the Eternal outfit. a red cloak with the black flames of Amaterasu.
Kawa is described as a caring person always putting others before himself and cares for his friends and allies.