After Tan Liansi, the next person to introduce themselves is Gao Wu.
An up and coming actor who has played some well received minor roles in the past, and who will be playing Rong Zi, Xie Huan's shidi(1), and the junior from the demonic realm who joined Frozen Peak alongside him. Another one of Yan Shuyi's disciples.
Rong Zi is also the drama's main villain.
While Tan Liansi's character will play only a minor antagonist role for some time before eventually letting go of her juvenile crush on Xie Huan, and will even help them later on -- Rong Zi will have the opposite journey.
He'll start out as Xie Huan's close friend, much more quiet and introspective than him, and in that way a much more believable Frozen Peak disciple than the unruly and fiery Xie Huan, but the one-sided crush he'll develop on his Shizun, Yan Shuyi, will make him grow resentful and spiteful.