HC story about Camui Gakupo in this askkaimeilu blog.
Since he was a child, Gakupo was meant to become a steady as stone man, without showing any emotions nor affection toward others and not get attached to people.
Camui had a childhood friend - Megurine Luka, who was there for him no matter what. He liked spending his free time from learning bushido with little Tuna lady. He loved collecting bugs, leaves, stones, while Lu - flowers for making flower crown.
Then, she introduced him to Kaito and Meiko, and if he was able to find a common language with the ice cream boy, Gaku was afraid of Mei, quite possibly because she could kick ass easily while he will got a katana. He considered Kaito and Meiko as good mutuals, later, colleagues..
But years passed, the boy became a young man, and all good things end someday..
Gakupo didn`t wanted to end up their relations, but his mentors forced him to sever all ties with people, who were close to Camui (and the closes person, who was to purple samurai - pink lady), because, as they said "the more you get attached to someone, the more painful it is to lose them"...
Camui believed that it was necessary, but didn't thought about how his words offend the one, who was his first and, perhaps, the only true friend.
Nowadays, he have many good colleagues, like Lily, Gumi, Una, CUL and etc. But with none of them he do no have a reverent relationship as he had with Lu.