dissonant and override are the only two who can actually play their chase themes, otherwise, they don't exist. 403 probably has ai psychosis vesryn. that's it, entire headcanon guardian goes into reverent's room just to try to find "magic spells" in his sheet music.. he doesn't know what a staff is. constructor has ptsd from agony, therefore any Pile Of Flesh (tm) makes him jump. that's it i can't think of any more