Although she's smart, she doesn't pay attention to her surroundings and people's feelings. Due to her childhood experiences, her social skills are virtually non-existent, so she prefers to do things at her own pace and alone. Hishiro wants to change, but she doesn't know where to start, which explains her awkward personality. She also doesn't know how to smile properly, often giving a forced smile that makes people around her look unfriendly.