Shiro is the smarter, calm and calculative half of the siblings. Abandoned by her parents, Shiro is an shut-in gamer. Along with her older step-brother, Sora, they form 『　　』 (Blank). Shiro has the personality of a Quiet, shy, stoic girl around her brother. She becomes vulnerable and weak mentally when he isn't around, Shiro is a genius in logic and problems, difficulty understanding emotions or behavior, relies on Sora for help in some fights. She responds in the simplest way possible. 