Like the Zae or shadowheart?
Shadowheart has attitude and for a...
it fits.
Zae...well that's her just being wound up about everything and following tiamat.
Im fine if its a dick reason, but the onus is on you. Id rather Shadowheart say "good, this has distracted me from my studies" and turns around or something. Its a small change, but in a game with rep having them go "are you sure you are booting me out of the party because youre a complete jerk and you are making this decision, leader, are YOU SURE?. Yeah dude, f off, i said leave.