Name: Iochi Mari Affiliation: Trinity General School, 1st Year Age: 15 Height: 151cm Birthday: September 12 Hobby: Prayer, Contemplation Gender: Female A devout and benevolent girl belonging to the Sisterhood. She always greets the students of Trinity with a kind and gentle smile. Despite her cute appearance, she has a calm and comforting aura, leading many students to seek her out for counseling. Because she always feels she is lacking, she dreams of becoming a wonderful Sister like her seniors. She is a cat-beastman and has cat ears, but no cat tail.

Name: Utazumi Sakurako Affiliation: Trinity General School, 3rd Year Club: Sisterhood Age: 17 Height: 160cm Gender: Female Birthday: October 4 Hobby: Praying A devout Sister student of the Trinity Sisterhood. She is serious about everything and is deeply trusted by many. While she always approaches her duties with a pious heart, her rigid nature sometimes makes her out of touch with trends or common sense.

Name: Wakaba Hinata Affiliation: Trinity General School, 3rd Year Club: Sisterhood Age: 17 Height: 166cm Gender: Female Birthday: May 17 Hobby: Organizing, Praying A diligent and kind-hearted girl belonging to the Sisterhood. As the person in charge of managing the Trinity Cathedral, she faithfully completes her assigned tasks and is kind to everyone. However, due to her clumsy nature, she often makes mistakes and lacks self-confidence. The bag she always carries contains a massive deployable grenade machine gun, but she has never once shown signs of finding it heavy.