While BioWare's Mass Effect franchise is known for its captivating worlds and narratives, a longstanding fan-favorite feature is undoubtedly its companion characters. Mass Effect's companions have always encompassed a fairly wide range of personalities and backstories, and typically serve as satisfying side adventures for players to enjoy when they're not focused on a game's main story. Judging by BioWare's history with compelling companions, Mass Effect 4 will likely feature companions of the same caliber.