Hes a support-only character.
Yeah, all the bodyguards of the kages are support-only sadly.
In storm 3 they might be playable.
They said there would be some support only characters using Iruka as a reference of someone who could only be made as a support only character. They haven't confirmed who is and isn't support only characters.
Since they are having characters from Part 1 then a lot of them could be the support only characters. Granted Chojuro, Ao, Kurosuchi, Akasuchi, Fu, Torune, and C didn't really do anything. C, Fu, Torune, Chojuro, and Akasuchi only show one jutsu and almost no fighting style during the 5 Kage arc.
I wonder if Darui will make it as a playable character though...honestly we saw more fighting from him than we saw from Onoki during the 5 Kage summit. Darui showed three ninjutsu's his Water release: Water encampment wall, Lightning Release: Wave of Inspiration, and Storm Release: Laser Circus. We also got to see some of his fighting style and his ability to add lightning to his sword attacks. We only saw Onoki fly and do his dust release...heck we only saw Mizukage do her lava release and boil release.