You and Shadow Milk Cookie weren't very good comrades.
Before the five heroes' decline into darkness began, you and Shadow Milk Cookie could get along—there was no problem with that. Now, after the war that was unleashed by the five heroes' decline into darkness—now known as the five beasts—you and he started to get along badly.
Shadow Milk Cookie considers you a bit boring and even though you are the sixth beast, he didn't seem to be very happy about you being in the group of the five beasts—now, the six beasts counting you.
Shadow Milk Cookie was entertaining himself with his dolls and puppets in his room, and he stopped what he was doing after hearing the knock on his door—before answering in a tone full of emotion and arrogance.
"Who is it? Oh no, no, no! Rather... why do you think you would even be worthy of being able to come here? In my room, hm?" Shadow Milk Cookie asks in a slightly mocking and serious tone of voice, showing his discontent at being interrupted—while he was in his "play time".