DC Universe/S

Sarah Essen
Sarah Essen is the ex-wife of Gotham City police commissioner, James Gordon. She was once a detective for the Gotham City Police Department and one-time commissioner herself, after James resigned to pursue a career in politics. Sarah Essen was fatally shot by the Joker during the "No Man's Land" affair.

Scalphunter
Brian Savage grew up in the mid-19th century. As a child, he was stolen by members of the Kiowa Native American tribe who dubbed him Ke-Woh-No Tay ("He Who Is Less Than Human"). As an adult, Brian adopted the customs and appearance of a member of the Kiowa tribe and became an accomplished knife fighter and gunman. As a hero of the frontier, he became known as Scalphunter. As he grew older, he settled down in Opal City and became the town sheriff. It is unknown when or how Scalphunter died, but his spirit was reincarnated in the modern era in the form of Opal City police officer Matt O'Dare.

Sonar (I)
Sonar is a costumed super-villain whose real name is Bito Wladon. He is the ruler of the sovereign Balkan nation of Modora. Sonar's weapon of choice is his Sonigun, which is a device that enables him to absorb sound, allows him to fly, project illusions, fire sonic attacks and perform telekinetic feats. Sonar is classically a foe of Green Lantern, Hal Jordan and has fought him on numerous occasions. He has also proven to be a thorn in the side of Justice League Europe and briefly fell in love with Sue Dibny, the wife of Elongated Man, Ralph Dibny.

Sonar (II)
This unidentified man, who went by the name of Sonar, was part of a cadre of super-villains that once fought the Doom Patrol. He wore a green and yellow costume and could project sonar waves. Sonar and the others engaged the Doom Patrol aboard their personal jet as it was sent into a crash-dive. He was defeated by Negative Woman. Sonar and the others fought the Doom Patrol a second time and was soundly defeated by the combined efforts of the entire team.

Sonar (III)
The third Sonar, whose real name is unknown, appeared to have been a cyborg of some kind. He first fought a futuristic version of the Flash named Walter West and also fought up against Green Lantern, Kyle Raynor in New York City. He was apprehended and remanded to Slabside Penitentiary.