Welcome to Doctor Who Mafia!
You are The Silence,
The Great Alliance Aligned.
Rather than a specific race, The Silence are a religious order.
Their agents on Earth have been there since before the dawn of mankind, directing human evolution.
Through the use of post-hypnotic suggestion, The Silence make people who see them instantly forget their existence.
You are a Janitor [1-shot] and a Busdriver [2-shot]
You may pick one player at night and if they die, their role will be hidden to town and provided to your mafia team. At night you can choose two players, and if any of these players is targeted by a role, it will be switched to the other.
You win when The Great Alliance controls the lynch vote (ie when noone else can win).