Avarian Starfall, Laerion Thelanor, Eilianeth, and Laeriel Thelanor (art by sirmeo)
The Night polycule, due to Ava's association with the night.
Eilia has followed Ava like a trusted shadow for thousands of years and they accidentally got married once and soul bonded over it(elves who marry become soulbound to each other).
Ava and Laerion are that kind of destined bond thing and they also got soul bonded, and then Eilia bonded with Laerion's twin sister Laeriel, who's also sweet (if always exasperated by) on Ava, and since twins kind of share a soul anyway those two became soul bound.
Eilianeth also shares a bond with someone named Willow, but that's in the original setting, where Willow is a dryad and destined with a pre-determined fate. Willow ended up in a different polycule in middle-earth.
In our original setting Eilia was the later addition to the polycule, in LOTR she was kind of already a part of it.
