Yu Mo and Yan Dan really do keep on missing each other. I think that fully describes the dynamic of his relationship…
Yu Mo and Yan Dan love is maternal. Yu Mo miss her but YD the one will find him eventually, sshe promised him. Also He is soulmate of that dragon Princess Zhao Lan.
He sabotaged when he decent to the mortal world and memory pill destroyed.
Currently the mystery is four of Sovereign Lords do not die from war. YY wanted to find it out and someone do not want him to do that. Prolly Emperor but no one know, let see things unveil later.
Rewatching ep12. When Yan Dan asking Zhi Xi " Why ". she is so full of rage. If ZhiXI is not her sister, Yan Dan probably will strangle her. Also I've never seen YZ face this angry, amazing acting.
Or it is just scheme of Zhi Xi? It is little bit unclear to me.
It is really refreshing episodes after all depression.
Youguai = demon. Worse connotation
But with YD gone, YY have nothing to held him to punish ZhiXi especially if she do not repent herself.