I see Vok always as an Go-Back elder ... one who already "lived too long" for Go-Back standard.
He is called one of Kahvi's old furmates ... made me fancy he is the one we see in the furs with her in the KAHVI series before she became chief. And it was Vok playing the flute to ease the pain when Kahvi was in labor with Venka.
Vok from the centerfold - with little Yun.
Makes me think he was her teacher with the flute ... maybe a mentor in general.