統一されたデザインが魅力の4人です。僕は栗山ちゃんが好き
ループ世界以前の冒頭の過去次元に単身で不知火お姉さんが隊長として出たくらいしか本編で登場して無いのでもっと出番が欲しいですねえ。

These four have a unified design that is very appealing. I like Kuriyama-chan
She only appears in the main story once, when Shiranui-onee-san appears alone as the captain in the past dimension at the beginning before the loop world, so I'd like to see her in more scenes.