Lyvyx, a plesiosaur with a light case of vitiligo, is kind of a sister to Vaïx - and I guess to that extend, Neysa as well. She is the daughter of the family that took in Vaïx during his biological parents' separation. She grew up with Vaïx for a good 10 years before Neysa found Vaïx.

After the brothers' reunion, Lyvyx still decided to hung around with the friend group from time to time. After all, she was the one who first taught Vaïx ice magic.

Lyvyx is described as calm thinker, but is known to be a bit of a know-it-all. She cannot decide stuff quickly, but tries to be optimistic. Despite of all this, she very much cares about her "step brothers," despite of their shenanigans.