Kaito was in some sort of relationship with Honoka, judging by "got angry when you act like I wanted", most likely toxic relationship or yandere, but what he revived is ACTUALLY COMMITING MASS MURDERER, completely opposite to pure Honoka that didn't kill Aiko...
Reason why Kaito killed Hanoka was because "she killed someone", now she killed plenty of people and now "meh, it's okay". WHAT. THE. FUCK. DUDE...
Since Claire got also mind wiped by Elena, something she did to protect her and she likes Shuichi as much as now Claire, but looks like is fine with her being in "relationship" with him... wonder what fucked up things Claire did...