Maecon is involved in the quest Blackpowder Courtesy.Maecon warns people about a poisonous green mist that has spread in a Lowtown side alley. He determines that canisters of the mist have caused everyone in the area to go mad or vomit until they died. If Aveline is not in the party, Hawke will just tell Maecon to step aside and the party will handle the situation. If Aveline is in the party she'll address the situation and tell Maecon that Hawke will be taking over. Aveline states that Maecon is a good man who would not exaggerate the situation.