Fifth Force

The Schoolgirl Strikers (クールガールストライカーズ Mesukōsei Sutoraikāzu) are group of young girls who some reason have the abilities to cross different dimensions and travel to parallel universes. They defend the earth from a race aliens known as They are the titular heroines, protagonists and playable characters of the visual novel-style Japanese RPG Schoolgirl Strikers.

Tierra Sensei
Tierra Sensei is the tutorial guide and a teacher at the girls' school.