Who is the Demoness?

Luhan saw Haru leaving in the morning. Luhan was sure that Haru would never go home but go around some other place. He got up, but someone barged in. Luhan was shocked and turned around. He was grabbed by his collars and pulled away. Jiamu was wearing a different costume, and he apparated to a mountain top close to his hideout.

"Let me go," Luhan screamed and pushed Jianmu once they reached the place. Luhan felt nauseous. He almost threw up. Jiamu looked at Luhan angrily and slapped right across the face of the Phoenix. 

"How dare you?" Jiamu asked. Luhan was clueless about why Jiamu dragged him away from the room, why he was angry, and why he got slapped. It angered Luhan even more.

"What the hell?" Luhan shouted back when Jiamu raised his arms again. Jiamu held Luhan by his collar.

"How dare you collude and spend time with that demoness?" Luhan did not understand.

"Demoness?" he asked his grandfather.