@Freestyle no he is just extremely stunned at the sudden personality change of someone he is close to and the best way for him to rationalize it is to blame it on the new ablity he has gotten that he knows can cause a change like that
This is a harem, so it is more of a question who will be the first wife, childhood friend or yandere older sister. My bet is on the childhood friend even if I love the yandere sister.
Blonde hair is gonna win again.... Fucking Author has a blonde fetish.... Letting my black haired girls heartbroken.... Seriously tho, his/her other works also have the same shit, still love it tho.
She already shown that she was like that even before he got his charm ability. Why would he still cling to the "it's charm" reasoning besides as an excuse?