Sakura
The mark on Sakura's forehead is a Strength of a Hundred Seal. It allows her to store chakra so she can use really chakra draining techniques without using up her own chakra, mostly healing techniques.
Über Sakura
The mark on Sakura's forehead is a Strength of a Hundred Seal. It allows her to store chakra so she can use really chakra draining techniques without using up her own chakra, mostly healing techniques.