Lucas "Luke" Fox is an employee of Wayne Enterprises, the son of the late Lucius Fox and an unnamed woman, a former associate of Bruce Wayne as well as the right-hand man and business partner of Kate Kane. Originally assisted Batman, Luke comes to assist Kate when she becomes Gotham's new bat vigilante, "Batwoman."
Luke is portrayed by Camrus Johnson.
- Peak of human physical condition: As a trained boxer and security expert, Luke is in top physical condition. He engages regularly in intense exercises and work the sandbag in the Batcave during his spare time. Due to his build and training he received as a boxer and at Wayne Security, Luke is remarkably strong.
- High-level intellect/Security specialist: Luke is an extremely intelligent individual, enough to be admitted to the prestigious MIT and successfully operate many of the instruments in the Batcave. He is regarded by Kate as one of the three most intelligent individuals she knew in Gotham, alongside Mary Hamilton and Alice. Also, having earned the title of the head of Wayne Security during his time working for Wayne Enterprises, Luke is also a capable and efficient security expert. Moreover, he demonstrated to be intelligent enough to decipher his genius father's encrypted journal on his own in a matter of few minutes.
- Computer specialist/Expert computer hacker: Luke is a highly trained computer specialist and hacker, managing to use even the highly complex Batcomputer.
- Skilled engineer: Luke has vast knowledge in tech, specifically in almost all of Batman's arsenal as he is capable to operate and know how does most of them work despite being meant for Batman only.
- Expert Investigator: Luke is an excellent investigator, as he managed to discovered that Julia was disavowed by the SRR, something not even Crows Security found out.
- Expert tailor: Luke is proven to be a highly trained tailor, having been able to modify Bruce's suit so that Kate can wear it, and later create the Batwoman suit.
- Cooking: Luke is quite talented at cooking; he managed to bake a cupcake for Kate's birthday.
- Expert hand-to-hand combatant/Martial artist: Luke is a very capable hand-to-hand combatant and martial artist. He is a very talented boxer, capable to knock out an highly trained Crows agent like Miguel Robles with a single punch.
- Expert marksman: Luke is an expert in the use of firearms, particularly pistols and Tasers. He fired a bullet into the Batwoman suit's chest from a medium distance with minimal effort.