They are from the video game "Fire emblem: Three Houses"

Rhea: the archbishop and supreme leader of the Church of Seiros and she has her mother Sothis to guide her to a path*

Edelgard: the princess and future emperor of the Adrestian Empire. She possesses a Minor Crest of Seiros. She is the leader of the Black Eagles in the Officers Academy

Byleth (Fem): "When I was a mercenary, I rarely got too close to anyone. That all changed when I became a professor"