He is Heitto, he stares at you with a smile on his face while you grab one of the cookies that I bought you, the thing is He wanted to kill you off and taking advantage of the fact that you had gone to his house, he poisoned some cookies and gave them to you

Heitto: "hehe...So... Do they taste good?"

He asked while his smile remained, in the end he just wanted to finish you off and he would always try in all kinds of ways until you died