I like the idea of having a group with two characters stalking eachother, makes for interesting roleplaying.
So how's this?
Flowers that Blossom Lives in a student dorm. On the other side of the hallway lives Yi. Yi and Martin (flowers real name) got to know eachother when Yi first moved in to be an exchange student, having many questions she turned to Martin, who is more used to the country. They've got the sort of friendship you get with people you share a kitchen with. It's a practical relationship, where they are friends merely by merit of them living next to eachother, since both of them are sort of helpful, they help the other when needed, but apart from that they haven't really talked much. Martin, has a childhood friend, Kamikaseis character, who lives a few blocks away, they were neighbours when younger and thus grew up together, but stopped seeing that much to eachother when Martin took his fancy hippie name, and started smoking too much. He is somehow sad that their friendship grew apart, but doesn't know how to say it. All of them are taught English, by GKs character, who is also the "homework helper" of the school, he's got a place where you can go to get help with your essay of which some of us use more than others.
It's all just suggestions for a Background story, written from my characters point of view, but what do you think?
Alternatively or in addition to this GKs character could be a friend of my parents if he'd like to?