A person who tends to maintain an aloof and condescending attitude to most people, a Tsubi is a person who is actually really sweet and playful once you get to know them. The hard thing is actually getting to know them.
They're a low key tsundere to everyone interested in even the simplest platonic relationship, but warm up to a few, after carefully gauging what type of pepole they're surrounded by. In short, a picky meanie pie, unless you get lucky.
tsundere Rubi rubiksxcube square
Girl: Hey you, come hang out with us!
Boy: I am not interested in socializing, with you.
Girl: Aww you know you love me~
Boy: Do I?
Girl: ....
Boy: I didn't think so.
Girl: Don't be such a Tsubi >;c