Robins

Robin 1
Robin 1, is the first Robin. He is the founder of the Teen Titans. He eventually disappeared and his current whereabouts are unknown. Robin 1 joined Batman when he was 13undefined and spent 3 years with Batman, and if alive is currently 23.

Robin 2
Robin 2 is known as Jason Todd. Last seen dead after beaten to death by The Joker. How Jason became Batman's Robin is unknown. Jason joined Batman when he was 13 and spent 2 years with Batman, and if he was alive he would be 20.

Robin 3
Robin 3 is known as the smartest Robin. So smart some say he might become the new Batman. Robin 3 joined Batman when he was 15 and spent 2 years with Batman, and is currently 20 years old.

Robin 4
Robin 4 is known as the most like Batman. Besides that, not much is known about Robin 4. Robin 4 joined Batman when he was 15 and spent 3 years with Batman, and is currently 18.