@Undertale_Sinner_0 hello fellow follower, (and friend/ classmate) I have worked up a draft on the two characters. The draft is currently under rewrite, I'm unable to determine when I'll get back to it if possible. I have other stories in mind. I will however rewrite the draft for a possible better understanding of the characters and their past starting from the beginning of Ryder's sorrow. I appreciate your reminder of the characters: prince Ryder, and prince Xen back story or past. If you have any more questions, please don't hesitate in asking.
Thanks-
Kōtonī za sadisutikku Yundere