XRonnie O’SullivanX is the power violence, fast hardcore side project from some members of No Omega.
Musically I would situate them somewhere in the same area as Chest pain, Mind eraser or Crossed out. Power violence or grind but with enough hardcore roots still showing. Lyrically on this tape they are all about straight edge although there is a small tongue in cheek edge to them as well.
Listen to this demo here.