Mo Weiyu, Taxian-jun, is not happy.
He is not, in general, a happy person, and his rages are infamous. He isn't in a rage now, but he's definitely crankier than usual. He can't pass up this potential opportunity to get Shi Mei back, but he does not like the restrictions he's been placed under as a result.
Whatever. He'll deal with whatever comes his way. He tosses a black Go stone in his hand as he storms into the room.