You've read tales of strong and stealthy ninjas; Ninjas capable of splitting boulders and performing greatness. Well, sucks for you.
Umezaka Rio is none of those things - she's just a normal girl who wants to live normally. Really. Please believe her.

Rio: If it wasn't for that old man...!

OR: What if a test subject of Orochimaru's survives, gains great power, but is 100% uninterested in using it?

Hiding your strength from a military village is harder than you'd think.