"You've all heard of the agent I'm referring to. Bartino said that he's available for this special assignment--both as a favor to us, and for a two percent cut of next week's take." - Tony Twist
Bartino is a character who is mentioned by Anthony Twistelli in Spawn issue #6. He is apparently the owner of Overt-Kill and is assumed to be a Mafia Don who is based out of Italy. He is not seen in the series, but is mentioned a few times.