[First Name] Worthington, Lord [Titleplacething]. Age 19-24. Son of the earl of Huntingdon, older brother of Lady Marie Angélique Thérèse Zéphyrine Worthington. Like her, he grew up mostly in Versailles and Paris.
Ian Gray, age 20-ish. Streetwise thief, specializes in stealing jewels and expensive trinkets. Possibly knows his way around bank vaults as well. May or may not be affiliated with Slater's gang. Childhood friend of Mary Roper.