Aki Adagaki is a rich, beautiful girl who treats all boys like dirt. She has the talent of giving all boys who ask her out a unique and mocking nickname. She has no real sense of what to do outside, as shown as when she wore cosplay to a date. She is shown to rely on her maid heavily, although she does not treat her well. She is also shown to having a huge appetite, which causes her great embarrassment. According to her confession about Masamune in her childhood, she was abandoned by him without any notice just after promising that she would stay with her even if her parents were to divorce. But since the time he disappeared, she got a huge appetite and is still searching for the reason through Gasou Kanetsugu or the self-proclaimed Masamune of her childhood.
Maid of Adagaki household. She seems to be a clumsy girl and is always pushed around by Aki. Yoshino later admits she was jealous of the friendship between Masamune and Aki. It was revealed that Yoshino had disguised herself as Aki eight years before, and rejected Masamune, giving him the nickname "piggy" or "tonsoku (pig's foot)" in the original Japanese. Makabe calls her "shishou" (å¸«åŒ ) which means master or teacher.
Lan's actual name is simply C - it's Gingetsu who decides to name him Lan (Ran). He was called C because he was one of the three-leaf clovers that once existed, and those triplets' names were A, B and C. Now he's the only one living left, and as he's living away from the Clover Project research facility, he's aging quickly (that's why we can see Ran as a child in the last volume flashback, and as a boy in his late teens or even early twenties in the other volumes, even when two years have passed only since he met Gingetsu for first time). Actually, his life will end in five years - and though he knows it, he still wants to be away from the facility... and not only because he wants to be free - but specially because he wants to be next to the person who's most important to him. Ran's character isn't much developed until the last volume either - a flashback to how Gingetsu and Ran met and their relationship began. However, Ran is different from Gingetsu: as a child, Ran is quite mature for his age; but he's innocent, caring, kind and doesn't seem to have any problem expressing his feelings. He doesn't want anyone to suffer, and is always willing to help if needed. He's sweet and nice, but not weak: his existence has been quite hard so far, and though he knew it wouldn't be easy, he decided to go for a change running away, risking his own life in search of freedom. (Sourse: Unspoken)