Toujou Shirayuki♀

She is Shin'ya’s underclassman. The first time you meet her in the shopping area, her purse is stolen by a thief, which later is retrieved by you. The next meeting is when Tama forced you to save her from falling tree branch. Seeing her bad luck, Rito convinced her to join them and to stay together in the Moonlight Pavilion. Together, all of them create a volunteer club in order to disguise their activity to solve cases, giving help and support in order to collect luck from many people.

[Edited from Kresnik's review.]