天池 志津子, Margarita, Maru-chan
Shizuko is the caretaker of a certain church on the island as well as the one incharge of the female side of the school dormitory. She is always wearing a sister outfit. Her Christian name is quotMargaritaquot while most students address her as quotSister Amaikequot instead. She is typically sisterlike and a nononsense type of person most of the time however she is also known to be very scary when she loses her temper. Kohei fears her as quotThe Person who cannot take jokesquot. Kanade calls her quotMaruchanquot and Iori calls her quotShizukochanquot which she doesn039t seem too happy about.