Okay, so with the group, we have:
Rozalia - Young thief girl.
Nikolaus - Diplomatic warrior.
Leonidas - Self-proclaimed casanova, and eccentric - but genius - inventor.
Dreet-Na - Argonian Mage
Rawlith-Dar - Lycan Khajiit Warrior
Valerion - Undead Necromancer warrior.
Dura - Vampire She-Orc
Haserus - Famous arrogant Redguard warrior
Saasi - Mysterious Redguard she-warrior

These are currently our Dovahfeyn. We've got two Vigilants on our tail thought - Falrielle and Gideon. The remainder of the characters I haven't mentioned just haven't joined the group yet, or are being introduced at a later date.
Delphine is an NPC, and is just coming with us to Kynesgrove - from then, she'll just be chilling with Esbern in that old Blades place.

Hope that helps! Oh, and in terms of who's travelling with who once the group splits, we're still deciding. It's your choice anyways.