Sean Sonus

"Guess I should be flattered. To think you've held out a candle for me after all these years. What are you waiting for?"

- Sean to Dinah Drake

Sean Sonus was a drug dealer involved in the murder of Vincent Sobel, boyfriend and partner of Dinah Drake. Following the S.T.A.R. Labs particle accelerator he became a meta-human criminal, now hunted by Dinah.

History
At the night of the S.T.A.R. Labs particle accelerator explosion, Sean and his accomplices were torturing Dinah Drake, threatening to hurt her and kill her boyfriend Vincent, holding her for two weeks. As the dark matter wave erupted throughout Central City, Sean ended up shooting Vincent, to Dinah's horrible screaming. Dinah's scream influenced a mutation of her own, as well as that of Sean, giving them both sonic-related powers.

After five years, Dinah tracked Sean's criminal contacts, eventually targeting him. She arrived at the premises, defeating Sonus's bodyguards, followed by Team Arrow. As Dinah prepared to attack her enemy, Sean used a meta-human power of his own, rendering her sonic scream a liability. As the other vigilantes came at him, Sean used his power to stop them at their tracks and escape. Team Arrow and Dinah eventually targeted him once again at a gathering of his gang and managed to take them on. After destroying a helicopter, Oliver tried to argue with Dinah to let Sean live, to no avail.

Powers

 * Meta-human physiology: After Sean was struck by the energy of the S.T.A.R. Labs particle accelerator explosion, his DNA and cells were altered to augment his sonic-related abilities.
 * Sonic-based vertigo inducement: Sean was able to use some sort of vertigo power to disorient his enemies and stop them in their tracks. However, a sonic dampener made by Curtis Holt negated his powers.

Abilities

 * Skilled marksman/Firearms: As a gangster, Sean was proficient with firearms.
 * Indomitable will/High pain tolerance: Despite his meta-human powers being sonic-based, Sean seemed to have some inherent high pain tolerance, which allowed him to take out Oliver Queen's arrow out of his shoulder with ease and, seemingly, little to no negative effects for his health.

Behind the scenes

 * In DC Comics, Sean Sonus was an enemy of Green Arrow and the Black Canary known as Discord. Humorously, in Arrow Sean was nicknamed "Dirtbag" by Wild Dog, a word starting with the same letter and having the same number of letters.
 * This is the second meta-human introduced in the shared multiverse to have vertigo-related powers, after Rosa Dillon, and the fifth character overall to be related to the vertigo effect m.o. (after Count Vertigo, Webb and Werner Zytle).