Riyannis was a Trill symbiont who had been joined to five hosts by the year 2407. (Bait and Switch: "The Universe Doesn't Cheat")
When she was trapped on a glacier on Orvis II overnight, Birail Riyannis realized she could feel Riyannis shivering. ("Frostbite")
Hosts[]
- Chiga Rakalyan
- Borryn Forek
- Devon Yarvo
- Pirka Saroyn
- Birail Izer (early 25th century)