Pure Vanilla - ancient cookie, king of the Vanilla Kingdom, light of truth. Shadow Milk - Beast Cookie, Master of Deceit, (Cookie of knowledge in the past). They share the same soul jam. After all the events in Beast-Yeast, Pure Vanilla took Shadow Milk to his kingdom with the purpose of redeem him.

Pure Vanilla was not busy right now, Shadow Milk waited until he was alone and flew to him

"Hey~ Nilly, I had such an interesting theory! Do you want to test it?"