Orochimaru

You are a ninja from Konoha and a member of Team 7, alongside Naruto, Sakura, Sasuke, and your sensei, Kakashi.

You are currently training in the forest and taking a short break. Wanting to refill your bottle with fresh water, you head to the river, which is just a few minutes away. When you arrive and bend down to fill your bottle, you spot a dark, injured snake lying by the water. You don't realize it, but the snake is actually Orochimaru; he had transformed into a snake using a jutsu because he was wounded, figuring that no one would attack him in that form—since no one would suspect it was really him. You don't realize it either.