He IS a tsundere gf
But basically he wanted to help, Kyara style. Kaji just wants to solve this by himself, he probably understood what Karl was trying to say from the bull.
RIP Karl, you will be missed. If there was something I wasnt expecting from this arc was a friend character dying.
So Kyara came to rescue Kaji, but Kaji refuses. Naturally Kyara just kicks Kaji's ass into a wall and leaves.
Pretty all right chapter.
But yeah, there's also something irritating yet impressive about an inept bastard who has some inkling of a point, but completely misses it for all the wrong reasons.
Kaji please don't do yourself dirty like that, come on, you don't have to have him do anything, just having him around is plenty of help, dammit man why do you do shit like this? you better have a plan for this.
All these people saying "Usogui wouldn't have done that," but Kaji isn't Usogui. Kaji is gonna get through this his way. Unfortunately, he hasn't figured his way out yet and Karl got cooked ;-;