If Jean is interested in training with someone who is completely ridiculous at fighting, I have a vampire queen for ya! She doesn't hold back in order to train people up but has great control so no injuries other than what he ICly agrees to (and her husband has healing magic and regularly fixes up her sparring partners so it's probably fine to say he gets all put back together after).

She'll be dying on the 25th but either before or after that would work!