Seth Stewart is back in the ‘‘Heights.’’ The Kent native originated the role of Graffiti Pete in the musical, first Off-Broadway and then during its Tony Award-winning Broadway run. After leaving the Broadway cast last August, Stewart returned to the show last month, this time in the touring production that starts a two-week run Tuesday at PlayhouseSquare. This time he isn’t Graffiti Pete, though. Stewart is co-dance captain for the national touring company and part of the ensemble. In a telephone interview from Pittsburgh, Stewart said, ‘‘It was kind of weird seeing someone else in my role’’ when he first joined the tour. Stewart is well-suited for his current job as co-dance captain since Andy Blankenbuehler, the musical’s Tony Award-winning choreographer, allowed Stewart to help create his moves. ‘‘The choreographer called me and a few other people in and let us put our own style into the mix, and that’s what he came up with,’’ Stewart said.