A white snake with |_| eyes and a small blue bow introduced as part of Ouro Kronii's New Year outfit in January 2022. She sits on Kronii's white fur boa, just off her left shoulder. See post #5058008.
Note that the white snake with a red eye on Kronii's obi is not another snake, but merely a static decoration.
The names Ouro and Boros are derived from the ouroboros, a symbol of eternity.