Ah, well, Battlefield Butler would simply be the characer's action skill. He has a robot that follows him around known as B.I.T.C.H.B.O.T. (Barely Intellectual Team Cache for Holding Burdensome Overweight Things) which carries all the ammo, shields, guns, etc. (has nearly limitless room inside itself) and is clinically depressed and near suicidal (doesn't have the courage to do it though, as the character programmed him that way). The character is semi-aubsive towards it.
BITCHBOT has a personality core accepting slot which the character would insert two main personality cores: G.R.E.A.T.R.O.B. (Generally Really Effective Autonomous Team Regenerator of Overpowering Barriers) that boosts the team's shields, increases firing rate, and gives out ammo from its nearly unlimited storage. While under the personality of G.R.E.A.T.R.O.B., it becomes practically motherly, spouting caring lines like, "Don't scrape your knee!" and, "let momma kiss your ouchies to make it feel better.
The other core, B.A.D.R.O.B., is a foul-mouthed, angry, destructive bot that uses all the guns in its storage to destroy every baddy (and sometimes goody) in sight.
So, does the Battlefield Butler sound like a good addition to the team?