Oh i love him, how he looks at her, how he treats her, how he feels about her wings, and how he always pushes her to be more but appreciates her struggles.
Nickname... maybe Han for Honey.
No Darling, since it's too close to Darla.
A less traditional one is Reo, for Oreo, since he is the Dark Prince. But maybe too modern for the wizard.
...đâșđ...