Anto's white-haired, roll-for-fives babe.
She's a member of the Song of the Phoenix, and she's the triad member from the House of Melody. (Song Min Feng is the triad member from the House of Silence and Yanyu is the triad member from the House of Harmony.)
After Kuan-Xi was kidnapped by the Whale Spirit Yanyu learned a shtick for locating the other members of the triad and has regularly been reporting on Kuan-Xi's whereabouts to the party. Check out Where in the World is Suzuki Kuan-Xi.