Selphie's limit break has an ability that allows you to kill everything in one hit. So does Odin. Does that mean Odin is a sorceress?

I think Limit breaks are a build up of emotion, then the character releases their anger in the form of a really good attack. I don't think Selphie gets her magical limit break from sorceress abilities. I don't think Square meant to have an explantion for it, either.