Zoe is twenty too, but I'm fairly sure her mother would have sooner died than had her educated in public schools. So sadly, it's unlikely that they know each other.

Elisha's only been in the Deck six years, but he's a Club, so they may have met?

Urania's too old to have been a student and somewhat reclusive/limited in her social circle...

Avery is too old, but they might be friends?