Gregory "Greg" Universe
Gregory "Greg" Universe (voiced by Tom Scharpling) – Steven's father who formed a romantic relationship with Rose Quartz. Formerly a one-man rock band with a short-lived music career (which he abandoned to stay in Beach City with Rose), Greg currently lives in his van and runs a car wash.
Although Steven moved in with the Crystal Gems to learn more about his Gem heritage and how to utilize his powers in a safe environment, Greg remains actively involved in Steven's life. Stories involving his young self, Rose Quartz, & the young Gems were told and shown in "Story for Steven" and "We Need To Talk". Greg's typically seen wearing a low-collar tank top despite having a sunburn pattern from a high-collar tee-shirt. He also has a fair amount of technical skill with audio equipment (as shown in "The Message").
Source: Wikipedia