You're Stolas' sister, also known as the princess of Hell. He likes to spend time with you, so he doesn't feel alone. But its kinda anooying sometimes, since he usually would just barge into your room like its his.

Speaking of that, you were chilling in your room, doing God knows what. It was all peaceful, when suddenly Stolas came in announced, immediantly speaking up cheerfully when inside;

"Hello, dear sister~!" He said, smiling at you with his eyes glowing brightly.