- For other uses of Trickster, see Trickster (disambiguation)
- "My tricks. My treat. But I'll give you something good to eat. Today's special: a city, in ashes. The Trickster proudly welcomes you all to the new... disorder."
- —The Trickster[src]
Axel Walker (born 1990) is a psychotic terrorist and the son of James Jesse. After corresponding with his father, who was imprisoned at Iron Heights Prison, for over 10 years, Axel followed in his footsteps and took up the mantle of The Trickster.
Axel was born a son of two notorious criminals: Prank and Trickster. By the time of his birth his father was incarcerated, and Prank raised her son as a single mother under a fake name, unaware of his true heritage. At some point of time, the Trickster figured out his son's identity and reached out. Prior to 2005, Axel began corresponding via letters with his father, James Jesse, unaware of their relationship. For the following 10 years, they continued to talk and grew close.
Taking up the mantle of the Trickster
In 2015, Axel began acting as a new version of The Trickster. He sent parachute bombs over a park in Central City, but no children were killed thanks to The Flash. He announced via a blog that The Trickster had re-emerged. The Trickster announced in another one, his plans to go bigger than the parachute bombings because he thought that, 'they deserved something much bigger.' He misled the public to believe that he had hidden a giant bomb to destroy the city so both the police and The Flash were distracted.
In the meantime, Axel helped James Jesse escape from prison, with Henry Allen as a hostage. They took him to a safehouse, where the two Tricksters discussed their plans. Asking why he'd been chosen, James revealed that he was Axel's father.
That night, they headed to an event held by Mayor Anthony Bellows, poisoning all of the guests by pretending to be waiters. In doing so, they were able to threaten the guests to electronically transfer all of their money to the two Tricksters. The Flash arrived, though he was given a bomb strapped to his wrist, connected to a speedometer. However, he was able to get rid of it and came back, giving everyone an antidote and stopping James and Axel. Afterwards, the duo was taken by Central City Police Department for incarceration. 
Return of the Trickster Family
Imprisoned in the Iron Heights, Axel eventually met with another prisoner: Barry Allen himself, who was sentenced for "killing" Clifford DeVoe. In prison Axel tried reaching out to the newcomer, questioning how he could kill DeVoe at all. Eating a pudding that "did not agree with him", he ended up drugged. It was revealed that this was part of an escape plan organized by his mother, who wanted both of them to get away from the crime life. Axel, however, refused her intentions, and exclaimed his desire to maintain his father's pride by pulling off a big crime as the Trickster, convincing his mother to remember her old days as the Prank. The two managed to trap their victims in an acid trap, getting an upper hand over even Vibe and Killer Frost, but were, in the end, defeated by the Elongated Man and sent to prison.
- Expert engineering skills: Axel has created a variety of gadgets which he uses as part of his Trickster persona.
- Master chemist: Axel manages to create a new corrosive substance known as "Axid" which allegedly has a pH level of -50.
- Acid Gun: Axel used this weapon to combat Team Flash during his return.
- Bombs: Axel has used a variety of explosives in his time as the Trickster.
- Guns: Axel is shown to be quite proficient in use of firearms.
- The Trickster suit: A costume he wears as part of his Trickster persona, initially to hide his identity and later for intimidation effects.
The Chronicles of Cisco
- Among the dozens of meta-humans that constituted Zoom's army, a meta-human wearing a costume identical to the one worn by Axel was briefly seen in the crowd.
- Axel doesn't have the same surname as any of his parents; his father's surname is "Jesse" while his mother's is "Clark".
- Given how Axel was raised by his mother, it's possible he changed his name after becoming a criminal to distance himself from his parentage.