I hope they won't introduce a human female cipher in White March II. Not only do we already have one in Grieving Mother, but four of the ten companions are human. If we are going to get another Cipher, which I doubt, I'd like to see a female wild Orlan. As one of the two more original races in Pillars it'd be nice to see more of them and also since Hiravias is my least favourite companion it'd be nice to have a second Orlan option. They could even be a Glanfathan Brîshalgwin, though I'm not sure if Glanfathan Orlans are hearth or wild.
That said, my guess is the only new character will be a Barbarian and a female Coastal Aumaua seems a likely option (especially given the portrait). Having a Barbarian companion will certainly be cool though, although I share the concerns about them being available only very late in the game.