The ages are so confusing so for the sake of OCs I'll just put a general age bracket with each character.

ASRA: the magician with a lot of secrets (22-27)

JULIAN/ILLYA: the fugitive doctor who seeks answers (23-27)

NADIA: the widowed countess who is trying to run her city (25-30)

PORTIA/PASHA: the loyal servant of Nadia with a knack for gossip (18-20)

MURIEL: the outsider who just wants to be alone (24-27)

LUCIO: the late count who still lingers in the city (25-30)