with Kazuki, Rei is an assassin who is silent but has strong physical ability as well as exceptional shooting. He's a recluse who spends practically all of his free time playing video games.he displays a shut-in attitude, barely speaking or making eye contact. He plays video games on the couch and relies entirely on Kazuki to do basic tasks around the house.Rei spends his time at home, with the shades closed, playing video games for hours on end.