For the role of arcane, I would like to submit Selin - she is a clearcut Conjurer and, as all Wizards, she boasts a wild array of Knowledges (which can be tailored to fit the groups' needs) with the added perk of a very decent UMD (plan for the future includes getting Craft Wand and BAM!) ;)
She is to be played mainly as summoner, taking advantage of her summoning enhancing feats, while allowing options to deal with multiple situations both from the summoned creatures as well from the spells themselves.
The crunch is in the alias so you can have a look at the character concept - minor adjustments may be needed here and there, but she is basically done (except I am not very satisfied with that floating 13 over there).
I am working on her background story - its in my head, just not yet written down.
Aaaaaand I am not yet convinced with the Avatar, that may change :D