That's precious! Considering Hinata's overall demeanor, I wouldn't be in the least bit surprised if Hanabi was super attached to her. Good luck to any guys tryin to get past the little sister security system!
I get that way when guys come poking around for my sister too. That the job of us younger people I guess. XD Strikes a personal cord-it's great! Eheee hee, Naruto will just have to sneak past the little sister next time-that is if he has the skillz! Little sister knows what he smells like XD