The Ryn, a sentient and humanoid species, possessed prehensile tails and distinctive white hair. Seldom encountered in the Core Worlds due to their itinerant nature, two Ryn individuals presented a shimmering pendant to Lyra Erso in the period leading up to the conclusion of the Clone Wars.
The Ryn were conceived by James Luceno for the Legends book, The New Jedi Order: Agents of Chaos I: Hero's Trial. Luceno later brought the species into canon by featuring a couple of them in Catalyst: A Rogue One Novel.