Harley Thawne

* Harrison Wells
* Harley Thawne
* Reverse-Flash

> *This ability to travel through time revealed the truth. My fate was to become your greatest enemy. I was never going to be the Flash. So I became the reverse of everything that you were. The more people you saved, the more you were loved... the more I had to take from you.*"
>
> —**Harley Thawne** to Barry Allen

Professor **Harley Thawne** (c. 2151) also known as the **Reverse-Flash**, was a meta-human speedster from the twenty-second century, a descendant of the late Eddie Thawne, a time criminal and the archenemy of John Waters/Barry Allen/The Flash.

A massive fan obsessed with the twenty-first century's Flash all his life, Eobard recreated the accident that was behind the Flash's powers, becoming a speedster himself. Almost two centuries from the 21st century, Thawne met Flash and learned various ways to become faster than anything. However, when Thawne was about to make his grand entrance and be hailed as a hero, the Flash beat him to it and stole his greatest moment from him, therefore humiliating him. That coupled with his discovery that he was destined to become the Flash's greatest enemy, the Reverse-Flash, Thawne lost his mind and took his rage out on his idol out of envy for never becoming a hero like him and spite for “humiliating” him.

Therefore, he decided to embrace his inescapable destiny and become the greatest arch-nemesis he ever had, prove his superiority as Reverse-Flash and becoming the opposite of his former idol and defeat him. This rage and determination to destroy John Waters attracted the negative version of the Speed Force to possess him, using negative energy and exercising his raw emotions, which he thought he created himself and used to travel through time without the Flash I being able to detect him. Since then, the two speedsters battled each other for many years, but neither of them was strong or fast enough to defeat the other.

After learning the Flash's secret identity, Eobard traveled back in time to kill Barry as a child to erase his foe from existence but was thwarted by the Flash of 2024 who brought the younger Barry to safety. The enraged Eobard then killed Nora Waters and framed Jimmy Waters for the crime instead, being known as the **Man in Yellow** after the incident. However, Eobard's connection to the Speed Force began fluctuating, trapping him in the early twenty-first century. Realizing that John was the only way to return to his time, Eobard killed a man in order to assume the identity of **Harrison Wells** as the director of S.T.A.R. Labs, and eventually learning that John changed his name to "**Barry Allen**", and to push through for the creation of a particle accelerator to ensure that Barry would become the Flash.

Posing as Wells, Eobard mentored the Flash and became the leader of a team that he assembled to stop the meta-human threats, to increase his protégé's speed so that Eobard could use the hero's connection to the Speed Force to return to his own time. During this time, he also developed a bond with Cisco Ramon as another protégé. After his plan was exposed and subsequently foiled, Eobard was erased from existence after his ancestor Eddie killed himself to stop him.