Here's a cute sketch I did of Kao carrying Siberia on his back. I've slightly redesigned Siberia to give her longer hair more similar to her father. Due to Siberia's status as the creator and protector of Starmaninja, she's rarely seen but Kao always knows where to visit her in her secluded grove. They actually spend a lot of time with each other, often for days at a time before Kao returns to the main Starmaninja world. Because of the way she grew up, she never really had a childhood, so they often roleplay as if Siberia is regrowing from being a young girl before her father's eyes, letting him experience the childhood he himself missed since he died shortly after she was born. Their bond is so unbreakable, Kao literally died 3 times to spend an eternity making his daughter happy, and happily ever after they live!
Fun fact: This image really helps indicate the stark difference between the Ratzu sisters, as Siberia very vividly acts like a daughter figure to Kao, while Kiara tends to act more like a second mother to him. You kind of see it as Kiara actually had a son, while Siberia doesn't have any children, but tends to enjoy Kao being a more dominant figure in her presence.
I won't get into detail of what the two Ratzus tend to do together. It's a secret even to the Stars.
