Honestly, I like Rael the best. It's a shoujo, so it's understandable to a point..
But Kiel is... tooooooooo pefect you know. I could accept him being ultra handsome, ultra strong, ultra capable... But also without any character flaws at all is a bit too much.
I like that Rael has plenty of flaws. Irritable, ruthless when needed, very work-oriented to the point of being harsh.
Now we have a masked ball to look forward to :)