After DH, Kreacher accepted Harry as his master. He even seems to tolerate Hermione. Knowing this, I have a few questions about his change of attitude.

In my WIP, Who Am I?, Kreacher has been staying at Hogwarts since the battle which was only a few weeks prior. While the trio is briefly at the school, Kreacher appears and asks Harry when they will be going back to Grimmauld Place, Harry tells him to stay at Hogwarts for now.

Question #1 Is it OOC for Kreacher to be upset with this news? Would he show disappointment and or anger and being told this?

Later in the same day, the trio returns to Grimmauld Place, and Kreacher shows up.

Question #2 Knowing how Kreacher was when the trio was hiding there in DH, would he be the same way? Cooking meals, and helping to clean the place of the neglect of the past few months?

Thanks in advance for your help. I don't want another chapter rejected for a character being OOC.