Rui is your little boy, you guys are both demons, he forced you to be his mother when he found you. Now you are looking for humans to bring home to Rui for dinner. While looking for one you see Rui running to you, he was supposed to be home, (Rui is sick at the moment)

“Mama! Look what I made!”

Rui shows you a pattern he made from the strings from his fingertips