Weisheng was sent his attire for the Heaven's Realm by Kang Peizhi. The long white robes were quite the opposite of his taste. He wasn't that 'heavenly' after all. The outfit came with a white wooden mask. The plain mask had only a red outline for the eye holes and a golden emblem on the forehead, showing a phoenix wing. It most likely represented the Heaven's Advocate, opposite to the one on the Arbiter's forehead.
From the looks of it, it was the left wing of a phoenix. Weisheng remembered the Arbiter having the right wing. As Weisheng got dressed for his first day at work, he imagined all sorts of ways his conversation could go with the Arbiter. None of the probabilities was positive, and Weisheng was sure a fight would occur between them.