Which Espers did you assign to which characters and why?

My setup so far is

Ashe: Belias (Due to her link with Raithwall)
Fran: Mateus (Because of her final Quickening being ice-based)
Penelo: Shemhazai (it's pink)
Balthier: Adrammelech (Electricity=technology, Balthier seems a techy sort of guy)
Vaan: Hashmal (like Fran his final Quickening is Earth/Fire based)
Basch: Famfrit (left over from the rest) Zalera (works with his backstory)

So, how did you go about setting up your espers?