Delita was a douche but he was a good character.

As far as his character is concerned, he did exactly what square wanted him to do, he befriended and gained your trust, then he betrayed you and made you mad at him. That's just his character...no reason to get all upset about it.

...Princes Ovila had it comin' though... I mean, why didn't she just leave when Ramza and Agrais came for her, she could've, it'd been bad but it'd still be better than being with delita. She's the one who bought all his Bul$hiz.

Ovila is to blame for all this.