ToME: the Tales of Maj'Eyal

Solipsist's thought form turns hostile when main character is frozen (from either trap or spell). Once freeze status is gone, form becomes friendly again. Tested with archer form, don't have the others.

All pets do this.

It's really the player turning hostile to his own faction so he can attack the ice block (as far as I understand it).

I prefer to think of it as, "Look! Our master has been frozen in ice. Let's chip him out and save him!"