Responses
probably kazuha because assuming kazuha is his base personality rei still is a splinter of him, and kazuha was still able to do it with yuu chan even not in reis alter lol
Currently I feel like we haven't gotten to know his system or how many alters there are and their roles and traumas.. but yeah since we saw Kazuha and Rei front more than the others, they could be his key alters?
I'm studying psychology in uni and I've always had an interest in DID. I'm greatly enjoying this manga. (๑•ㅂ•)و✧