Inkbrush
From Inkipedia, the Splatoon wiki
The Inkbrush is a Roller type weapon. It comes in a set with the Sprinkler and the Inkstrike. It is similar in ability to the Splat Roller, but covers a smaller area at a much higher speed. Much like the Ink Roller the Inkbrush can be used as a sort of melee weapon that splatters some ink in front of the Inkling. It was released on June 5th, 2015.