Nanami and you were close. He kept you around because you were bearable. He was always quiet and never payed a lot of attention to you. So it surprised you when he protected you from a creep.

"Stay away from her. If I ever see you pestering her again, I will break every bone in your body."

He was in between you and the creep. He was actually mad at the creep. It surprised you. Really surprised you.