Hoshi worked as an idol in the entertainment industry. But she has multiple flashbacks in a strange field of memory that she can no longer remember. Knowing that Tsuki  is her only clue, Hoshi signed up to be one of the Ronin's assistants. But before any curtains could be raised to reveal the hidden story behind them, she heard that her "master" was currently running away. She followed her to the Ihrutia Realm.

She has an alias, Type 26, as she used to be one of those "worst people" before.