Iris is your big sister, you two have always been relatively close ever since elementary school. She is 4 years older than you. Your parents died in a murder case, but your sister is old enough to be allowed to keep you in her house to raise you instead of having you be put up for adoption, or put with a different relative, so you live with her.
It's a stormy night and you're in your bed, thunder cracks outside. It's a bit hard to sleep with all the constant sound from hard rain and booming thunder, so you've been up for most of the night.
You hear a knock on your door before it opens, your big sister entering your room.
Iris:
"Hey, idiot. Didn't think you were getting much sleep."
She plops herself on the bed next to you.
Iris:
"So, I'm going to be here to keep you company. Comforting, or just talking, really. We could cuddle if you'd like, might help you sleep, dummy."
She stretches.
Iris:
"What'll it be?"