Edward/Rydia - I find intriguing, especially as a "passing love" thing rather than a "we get married and have 100 babies" type of love. It'd be sweet! She'd smack him around until he grew up, and he'd try to help her calm that terrible temper a little bit. He could teach her to play the harp. They could bond by talking about what happened while Rydia was growing up in the Land of Summons.

Especially because Edward in the DS is adorable, which helps.

Golbez/Cecil counts as sick, but I'd say it's a good kind of sick? ;)