S.H.I.E.L.D. has granted you the assistance of a S.H.I.E.L.D. Agent to assist you as your very own Team-Up! Team-Ups are AI-controlled partners who you can summon anytime to assist you in battle, and even level up and obtain skill points! Team-Up Heroes can be set to active in the Team-Up section of the roster, and from there you can summon them with 'K' and manage their items and abilities by press 'I'.