Dick Grayson
Nightwing
Gotham City
Batman Family and the JLA; formerly the Teen Titans, the New Titans, the Titans and the Outsiders
John Grayson (father, deceased), Mary Grayson (mother, deceased), Bruce Wayne / Batman (adoptive father), Damian Wayne / Robin (foster brother), Jason Todd / Red Hood (adoptive brother), Tim Drake / Red Robin (adoptive brother), Cassandra Cain / Batgirl IV (adoptive sister)
Vigilante and detective, former police officer, former Circus Acrobat