"There is more to being a shinobi than jutsu and fighting, you know." - Ai to an opponent. Ai Mizuumi (あいみずうみ, Japanese for "Indigo Lake") is a jōnin-ranked shinobi that served and fought during the Fourth Great Shinobi World War as an ambush and mid-ranged specialist for Kirigakure. His fighting style revolved around employment of a mixture of Water Release and Lightning Release techniques, wreaking havoc on his foes like a storm, coupled with his Kekkei Genkai of Storm Release, earned him the moniker of The Pale Storm of the Mist.