The wolfspeed tattoo is a disposable used by Noa Rylie in Metal Shadow Prelude. It is a tattoo on her right ankle. Through it, Noa can attain extreme bursts of speed. If she presses her palm to it long enough, the tattoo disappears and she gains the ability to instantly turn anything she touches (such as water) into ice.
Like many things regarding Noa, no information was given during the Prelude as to the origins of the tattoo, or its full list of functions.