[quote=@Archmage MC]
Ya know, I dunno what Marry and Sera's fusion would do. Any suggestions?
[/quote]

I have an idea if you like.

have a floating set of free floating kite shields that act as the wings and can be shifted around her to guard various directions or used to strike at foes. She flies using those as wings and the levitation to give unmatched Arial speed and agility.  

[hider=Like these]
[img]http://vignette2.wikia.nocookie.net/endless-legend/images/7/7b/Concept-Allayi-prayer.png/revision/latest?cb=20160413130415[/img]
[/hider]
 
as for personality, perhaps very restless, needing to seek out worthy opponents or just experience new things.