i write kei a little to a lot of bit mean to everyone because i think hes mean hahaha. i dont think he intends to be cruel tho. he just has a very strong personality and tends to tease/be mean as a way to banter and i think he can accidentally come off patronizing or a little bit of jerk when he puts people on the spot or goes hard on teasing them but you can tell he does it out of love… with taki i think he tries the hardest not to hurt his feelings especially now that hes talked about the handling taki manual and how taki doesnt like to be made the joke, but i do think he can be a little mean to him!! in an older brother im just looking out for you sort of way lol