Leo Dooley

Leopold "Leo" Francis Dooley is a 16-year-old bionic boy and the main protagonist in Disney XD's Lab Rats. He is considered a social outcast due to most circumstances considering his small amount of friends. His step-dad, Donald had a lack of trust for Leo due to accidental destruction caused by him, but has started to change his opinion (in Speed Trapped, he appointed Leo as 'the enforcer' to keep an eye of his siblings). He is Tasha Davenport's son, Donald Davenport's step-son and Adam, Bree and Chase's step-brother. In episode You Posted What?!?, S-1 crushed his right arm by dropping a steel beam so his step-uncle, Douglas Davenport bionically enhanced his severely injured arm to save it.

He is portrayed by Tyrel Jackson Williams.