Near impossible without any aspects or help from his friend.
You might also want to be diplomatic with your GM on this, as this is treading close to trying to rules-munchkin a disadvantage away. But the spirit of your goal is still a good, dramatic one: count on your friends to help you, and without them, things could get really dark for you.
Also, the player may want to get some sort of Aspect that pertains to situations of will or control, unless his concept is that he is doomed to go berzerk unless he has companions to bolster him. The player could also be doing "navel-gazing maneuvers" to create his own Aspects to bolster his self-control.