If Monroe was a hero, then Monroe’s personality really doesn’t fit with some of Quirrel’s actions.
Also, the Defence Professor lied-with-truth about having stolen Quirrel’s body outright “using incredibly Dark magic” when questioned on the real Quirrel’s whereabouts.
Also, the Defence Professor lied-with-truth about having stolen Quirrel’s body outright “using incredibly Dark magic” when questioned on the real Quirrel’s whereabouts.