DANMACHI - Agnir the Half Vouivre.

Born from a Vouivre outside the dungeon, the half-human, half-wyvern-snake girl son quickly grew up, with a pretty half-elf-like face, slightly pointed ears, amber-colored eyes, and his pale skin with an almost silver-grayish tint. His hair was azure blue like the sky, and even after growing from a baby to a teen in a matter of months his frame never exceeded 165 cm also despite rapid growth it remained childish in appearance living with his "cute dragon mommy" until the day humans happened...
Even though he had been human until a year before, he couldn't control himself, he became a half-man, half-wyvern monster and slaughtered the humans that were left...
He named himself Zeinnairth Argent (Zennith+ Nithe(dragon) + Argent Silver and parted in direction to Orario grasping his new collar in his chest, a red crystal that is his mother's Vouivre Tear he vowed with his fist clutched around it and said loud that he will become strong enough to live a long life and to change this world!