A VRChat avatar produced by Disshimu, described on the Booth shop page as "a boy and dragon of light who illuminates the darkness".
By default, he has long white hair, a grey and white body, and an oversized white shirt with long sleeves, hanging off one shoulder.
Although not officially produced by Disshimu, various alternate assets (clothing, textures, models, etc.) exist on Booth and other storefronts.