Jamie

Jamie (full name Jamie Osen) is a supporting character in the anime adaptation of I Left My A-Rank Party to Help My Former Students Reach the Dungeon Depths! (aired in 2025).

She is a skilled mage who was formerly part of the A-rank party Thunder Pike, where she served as their primary spellcaster. In the anime, she's portrayed as the only morally grounded member of that toxic group—the rest treated the protagonist Yuke poorly, and after he left, they turned their bullying and frustrations onto her as well. Motivated by the need to earn money for medicine to treat her seriously ill younger brother Tac, she endured the party's dysfunction for a long time.

Jamie stands out for her conscience: she secretly records evidence of her former teammates' crimes, ultimately betrays Thunder Pike to save Yuke's new party (Clover) during a critical confrontation, and performs a heroic sacrifice to help them escape (though she's later rescued). As a result, she's given a reduced punishment, a one-year suspension from adventuring and works temporarily as a guild receptionist while reflecting on her past and seeking redemption.

In the anime version, she's depicted with twin-tail blonde hair, green eyes, and a caring, level-headed personality often described as one of the more "sane" characters amid the story's drama. She's voiced by M.A.O. (Japanese) and Celeste Perez (English dub). She develops a close bond with Yuke, eventually joining Clover after her suspension.