Natalie: Multi-class, as explicitly stated; I don't know which classes. Probably sorcerer is one.
Nathaniel: Rogue.
Lexi: They already have a rogue, don't they? Possibly either rogue or ranger.
Kenna: Bard, like her counterpart.
Zerkanus: Probably wizard.
Ivory: Probably cleric.
Thura: Fighter or barbarian.

I am not good at this, am I.