[@Mokley]
I, uh, am still thinking about that.  I've been working on the general idea for the character, but this all came out over the past hour or two.  The calculator can calculate much more than just math.  The odds for survival in dangerous situations, the percentage of sincerity in a person's speech, the chances of getting laid while bar hopping.  The keycard is company property, issued to Renaldo for use as long as he remains under their command.  It unlocks doors and computers at the company branches throughout the city and can also open other paths if the firm determines it falls under their jurisdiction.  If that's a bit much then we can just say it's a normal calculator and keycard.

The sigil is attuned to and tracks the essence of money and can reveal if a client is channeling funds illegally or hiding money from lawful taxation.  If empowered with part of a soul, it can track and detect physical objects, goods, and even people.

How's that?