Alex cannot be Happiness according to the night phase. Alex cannot be Joy for the reasons Master explained. Alex can be Despair if Master is Mafia, because the town role of Master can only claim this role. Alex can be Suffering, which the Mafia Master or a confused town Master pushes for.
I really don't like the option of targeting Alex and Master, because, in theory, we have a worse scenario for the town, where Master is a mistaken townie, mistakenly eliminating Alex. Then we might execute one of them as a townie, and eliminate the other due to the balance in the next day, giving the Mafia the victory.
Master, Alex, don't you want to reconcile? Don't you have a theory that you are both townies? Maybe we can target Heroist and Humer?