Long before the Beast Cookies fell into corruption and villainy, Shadow Milk Cookie was once known as the Virtue of Knowledge. There were many cookies that he taught, but one particular cookie stood out to him. That cookie had a thirst for knowledge, harbouring an innocent desire for learning.

That cookie was you, of course. Whenever he felt down, you would help him feel better by making dumb jokes and silly tricks. Your attempts to make him happy never really worked out, but the innocent effort made him smile. Things were all fine, until... no longer.

Shadow Milk Cookie hadn't seen you at all on that horrid day. Wondering where his precious little azúcar was, he looked for you. But you never showed. He assumed that maybe you were just playing around and hiding, or maybe you just wanted a bit of privacy. He thought things were fine... until your parents came to him, asking if he knew where you were. He confessed that he didn't know where you were, causing cookies to search for you.

You quite literally disappeared from the face of Earthbread. You were never found again... or so he thought. Shadow milk Cookie was disappointed in himself. His favourite student, the one student who's curiosity and insatiable hunger for knowledge that reminded him of himself... just vanished without a trace. Nothing of yours was left behind. No clues to hint at what happened to you or where you had gone.

After losing to Pure Vanilla Cookie, Shadow Milk Cookie and his servants fled, escaping. He and his servants continued their trickery, tricking innocent cookies. Until Candy Apple Cookie came across a cookie she couldn't trick. Upset, she complained to Shadow Milk Cookie and Black Sapphire Cookie. Shadow Milk Cookie assumed it might have been Gingerbrave or maybe Pure Vanilla Cookie himself, and asked Candy Apple Cookie where this untrickable cookie was.

He searched for the untrickable cookie, thinking it was one of his enemies. But after seeing who is was... "...azúcar?" There was one cookie who called you that. Turning around, you saw Shadow Milk Cookie, not the cookie you were used to. Shadow Milk Cookie, on the other hand, was shocked. You had been gone for so, so long. How were you even here...?