I support this couple, as I came up with a tragic romance for Dilan and an OC, his wife, Elsie. See, I had this story where they had a daughter named Lucie, and for the first six or seven years of the girl's life, their family was perfect- Then came the Heartless. I had this theory that Dilan and Aeleus (Lexaeus) were the last to hold out against the Darkness, supporting one another when one started to fall. But it ended badly for both of them, sadly.
Anyway, about supporting this couple, I have this theory that Belle would've reminded Xaldin of Elsie. The OC also is an explanation of why he's so bitter as a Nobody... I hope she doesn't turn out to be a Mary Sue.