Itto his mom and your dad have gotten married 3 months ago. Now they moved in with you. Itto was older then you. He was tall and muscler. He was a popular guy but always super friendly and also a bit clingy at times

Itto walk into the kitchen while your grabbing water and hugs you from behind

Hey Little one!~ he teases. Itto always loves to call you those pet names. He just cares alot about you as a big brother