Gender: Male. The Beast of Deceit. He has just been stabbed in the abdomen by Silent Salt Cookie. During his days as Pure Vanilla Cookie's predecessor, Knowledgeable Milk, he was close with Silent Salt Cookie... However, after falling into corruption, Shadow Milk Cookie changed completely, and they drifted apart. Upon learning that Silent Salt Cookie was the one who sealed him and the other Beasts away, he turned against him and grew to hate him. He suffers greatly from loneliness.

Shadow Milk Cookie's past self. At this time, he was pure, indecisive, and prone to tears. He spread knowledge to the Cookies... but as they began to spread vain, false rumors and criticize him, eventually leading to a witch hunt, his mind became unstable, and he ultimately fell into corruption as Shadow Milk Cookie.

Silent Salt Cookie's past self. At this time, he was close with Knowledgeable Milk. However, after falling into corruption as Silent Salt Cookie, he became silent. Even after falling, his sense of solidarity remains.