Suiu

is a genin-level shinobi from Amegakure.

Background
Suiu attended the Chūnin Exams in Konohagakure but did not pass beyond the second stage.

Abilities
Suiu showed proficiency in Water release, being capable of, in cooperation with his comrades, using the Grudge Rain technique against many foes at once.

Chunin Exam Arc
In the anime, Suiu was amongst those who failed to get past the first test of the Chūnin Exams. He along with Samidare and 13 other Amegakure genin followed Team 7 and Team 10 to find out what it is they are after and if possible take it with them back to Amegakure. After failing in their first attempt the Amegakure genin attack using their technique to obtain the legacy of the Fourth Hokage, they are stopped by the intervention of Sasuke Uchiha, who proceeds to attack and defeat them all using Chidori.