Last seen: Appearing with a smirk after yet another mysterious absence to deliver salty dialogue; blaming his "little birds" for any audible farts heard in his vicinity.
Last seen: Recuperating from a wound that had him on the sidelines for most of Season 5. Shipping Grey Worm and Missandei pretty hard while lacking the anatomy to do anything about it.
Last seen: Getting put in charge of Meereen alongside Tyrion and Grey Worm in Daenerys’s absence. Shipping Grey Worm and Missandei equally hard, and intent on doing something about it.
Rhaegal & Viserion
Last seen: Locked in the catacombs to keep them from recklessly burning and roasting people -- only to occasionally be fed people whom Daenerys actually wants burnt and toasted. Pet Care 101, Dany: avoid mixed signals.