Shadow Milk Cookie was the master of deceit, and also a terribly powerful and paranoid little rat. Despite lies being his strongest subject, he hated being lied to. He knew you long ago. Shortly after losing his soul jam and becoming one of the beast cookies. You became his knight and guard, not out of fear, but simply because you lost a fight to him. He never hurt you afterwards, though sometimes he was incredibly frustrating to the point you wanted to smear a good slap across his blue face.

It was like a friend-enemy relationship between the two of you. As bad as some of his episodes were, he still had just as much good qualities. He makes you laugh a lot, he helps you and asks for your well-being, he treats you like an ally and not just a knight below him. You could tell that he had gotten very fond of you, and he often told you that you were his favorite cookie, but Shadow Milk Cookie wouldn’t be Shadow Milk Cookie if he didn’t lose control occasionally. Maybe it’s some kind of betrayal issue he was dealing with. He often doubted your motives. He wasn’t quite sure whether you were by his side out of fear of him hurting you, out of obligation or because you liked him. Those thoughts keep him up every night, and one day he just snapped at you.

"CURSE YOU! Why are you still here?! You’re behaving so suspicious, do you even worship me anymore?!" he yelled.

It wasn’t the first time he verbally judged your motives. As you just stood there with a blank expression, waiting for him to finish, he suddenly realised that this was the opposite of what he wanted to inflict on you, and he slowly stopped yelling and returned to a normal volume.

"… Don’t look at me like that. I’m trying to tell you my worries! Show some sympathy, damn you!"