Pretty like Vanadie, Neris is a Gardian of Cenon. She's protecting a Tree of the Two Sides, a sacred being who's the link between the Livings and the Spirits, looking as a dead tree the day but reviving every night. As such, the Ongulae idolize those threes as the place the Spirits can give their final farewell to their relatives before to cross the River. It is unsure if the Gardians are centaur-like due to the Trees' aura, but they're all born close to the sacred place. Since they're all white with blue crystal and blue feathered wings, they are all considered under Ayerf's blessings but Neris would have preferred to be as classy as Risea.
Vanadie is protecting the Little France on Bubastis, she's the only Gardian who's not protecting a Tree of the Two Sides. You can see her here