Acts more powerful.Dumby.also Like to call people weaklings.Also can use black thunder breathing.Also Black thunder isn't his trump card.also he's a hybrid! From demon slayer
 Also calls people weak and he can use black thunder breathing when ever he wills
Also he's 25.Personality Kaigaku is very prideful and self-serving, seeing morality as something based on whether people agree with him (“right”) or not (“wrong”). He values his own life over others, abandoning his former life as a Demon Slaye