Ahoy! I've been talking to Makari, and you guys are getting one of two healers on the team! But while we have a suggestion, we're not sure which you'd prefer.

Raine Sage: is a white mage a la tabletop/video game definitions of it, light spells and healing, so she fits the flavor to a T. She may also be the more effective of the two at healing. That said, being a video game white mage, she fits the standard Power Spellcaster Thus Slightly Squishy template.
OR
Septimus: has more than enough magic to qualify, though may be somewhat less of a healer than Raine, and while he's got magic and it is highly offense-oriented magic, this includes 'and now I stab you with a sword to the face.' On the other hand, this makes him not a squishy glass cannon and the gamer instincts in both Makari and I are screaming that you do not send out a team of all mages without a tank of some kind.

We think maybe it'll be healthy for Team Magic to have a powerful melee fighter along, but we also thought we'd let you guys choose.