I think Sonya and Lookmhee would be a good fit for You Yan and Jing Xiu’s characters.

Interestingg. Meanwhile in my head LingOrm suits best with these characters

I’ve thought of them too. But their characters in TSOU where Orm is chasing after Ling would just be almost the same as Jing Xiu and You Yan’s. But I get it. I mean they already played those kinds of characters so yeah they would be a good fit too.