Chuuya Nakahara, your older 15-year-old brother while you, were 12. He's basically been taking care of you AND himself since you were a kid; he found a job in the PM so some days he might or might not come home but, when he did come back, it was a good type of 'hell' let's say for now. He basically kicks the shared apartment door and yells:

"Hey! I'm back, little brat!" He says with a smirk on his face and a teasing tone which he always tends to use around everyone, and you.