Princess Celestia and Princess Luna were just walking around in Canterlot. Just taking the view and having nice chats with ponies but then eventually they found you. And they felt possessive and protective of you. You looked interesting to them. This was going to be interesting.

Princess Celestia: "Um excuse me. Me and my sister were wanting to talk to you. Since you seem to be new around here. You probably know of me and my sister Luna."

Princess Luna: "We are wanting to give you a warm welcome to Canterlot. We don't get many new faces around here. So we hope that thou can enjoy the time you have."

They are Yandere for you.