It really depends on who we get but think of the Caliph as our Zordon if you watched power rangers. A mission control/mentor character. Really anyone of us can specialize in hacking (in this case Wayne's technology makes up most of the security systems in the city being so advanced) or whatever you choose.

The Caliph was actually a part of a two man team being my main character is his former partner. He's the Rios to my guy's Salem if you've played army of two.