Board Thread:Off Topic/@comment-25110963-20160313061904/@comment-26397825-20160403045353

You seem to think Mercury actually cared about whether Ruby lived or died in that hallway, or how important it was for him to actually fight her. It wasn't.

He was just delaying Ruby so she couldn't stop the fight until it was too late; once he was certain that the fight had progressed far enough he dispappeared. He stopped her from calling for help, as that would potentially stop the fight.

He wouldn't focus on Ruby alone, ignoring the other guy. He wouldn't focus on the other guy, ignoring Ruby. He'd delay them, and then once he got the all clear from Emerald or Cinder or got out to see Penny being cut to pieces, he'd ditch them and go. He wouldn't be around for your other guy to sucker punch, as his job is finished as soon as he sees that Ruby is too late to stop the fight. He doesn't get paid to stick around and beat her up more.