I made a joke DnD character once, a sorcerer who's familiar was a mimic. You can't really have mimic's as familiars but because we all made joke characters with outrageously stupid abilities, I was allowed to have one. We had many a thief die while praying on our camp because they opened up that chest. A character with a chronic illness isn't something I can say I've roleplayed before. I'll try my best to do it though.