Alrighty...
Victor - Fallout: New Vegas
Raziel - Legacy of Kain: Defiance
Kanji - Shin Megami Tensei: Persona 4
Sigma - Megaman X games
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
I can see it now...
Victor: "Howdy, friend!"
Raziel: "What manner of creation is this?"
Sigma: "It's a robot, though I'm not familiar with the design."
Kanji: "Who ARE these weirdos you invited, man?"
ME: "I thought it'd be cool to have them over. Yo, guys! C'mon, let's play this game!"
A little later...
Raziel: "These two are passing cards under the table. I've seen it through the nether realm. And Sigma has clearly infected Victor with his power!"
Sigma: "What? I have..."
Victor: "...no idea...what you're talking about, friend."
Kanji: "Don't worry, I'll fix this! PERSONA!!"
*One powerful lightning attack later...*
Sigma: "Sorry fella, but MY weakness is the Shining Finger."
ME: "...and Windows 95. So, sit down Sigma, or I'm installing it in you."
Sigma: "I'll be good..."