[quote=Hillan]
No, the problem is actually with the other two. They leave no room for counterplay. Someone eats the candy, they're out, or essentially useless.
[/quote]

C-Counterplay? You mean like, not eating strange candy given to you by an enemy Kunoichi?

The best way to judge equipment is to use [i]"Kunai Rating"[/i], which bases their balance off the effective power of a kunai. In this case, if Kunai were a 5, her candies would be a 3 or a 2. That puts her safely below the Kunai Rating, meaning it's probably balanced.

EDIT: Oh, and as Reflection said, they were never really meant to be used on players.