Ryan Choi

* Ryan Choi
* Atom-Man
* DCIU Concept Art

Ryan is the son of a wealthy Hong Kong businessman and a world-class neurological surgeon. Growing up, Ryan was among the most gifted students in nearly every subject at the elite schools that his parents would send him to. When he was nine, Ryan spent a couple weeks in the summer at Ivy University's special program for child prodigies and there he met Ray Palmer and Al Pratt, and could tell they were working on something revolutionary.

After his return to Hong Kong, Ryan continued to exchange e-mails with Palmer and Pratt. Though neither Ray nor Al shared their "small" discovery with Ryan at first, they did farm out some equations and small experiments to Ryan on occasion.

When Ryan was eleven, he again attended the Ivy Town summer program and there Ray and Al decided to show their progress to Ryan. The "Bio-Belt" was the fruit of their endeavors, which allowed the miniaturization of Ray Palmer, allowing Ray to become the superhero known as "The Atom". Naturally, the young Ryan was thrilled to have helped in the creation of a hero and was slightly upset when the men made him swear to secrecy. Dismayed, Ryan returned to Hong Kong, finding the rest of his life dull by comparison.

When Ryan was thirteen, he again got to return to Ivy University, this time as a student of the same program that had fostered the teenage genius of Ray Palmer. As a participant in the program, Ryan was a favored student of Palmer and Pratt, for obvious reasons, and became an integral part of The Atom's support team, requiring Ryan to become an expert in computer hacking, first aid, forensic chemistry, microelectronics, and criminal psychology.

In 2010, Ray Palmer’s Bio-Belt malfunctioned after a scuffle with Sportsmaster. As a result, when attempting to repair it, Ray was shrunk while the device failed to shrink with him. Ray's girlfriend, Felicity Smoak flew out to Rhode Island to help Ryan and Doris repair the belt. However, during the attempted repairs, the belt released a powerful shockwave of energy that engulfed both Ryan and Doris.

Due to their positions at different ends of the shockwave, Ryan was shrunk down to the same size as Ray while Doris grew to be several hundred feet tall. Luckily, Felicity hadn't been hit by the shockwave and was able to deduce that the blast had soaked their molecules with enough energy that Ray, Ryan, and Doris could learn to control their size-shifting abilities at will, no longer needing the glitchy Bio-Belt; and the trio was able to return to their normal sizes.

After this, Ryan and Doris adopted the heroic identities of "Micro" and "Giganta." Instead of becoming Atom's sidekicks, they commuted to the nearby town of Happy Harbor to join the covert team Cyborg had dubbed "Young Justice" as field operatives and to receive a much needed training in how to fight and effectively master their abilities (Note: Ryan and Doris had been members of the team before that, working as support staff with other teen geniuses Wendy Harris and Marvin White); and when the program went legit, Ryan moved to San Francisco to become a Teen Titan. He also gave up on resisting Doris' advances and just resigned himself to being happy that a beautiful girl was interested in him.

Recently, Ryan helped Ray modify the Bio-Belt with a Singularity Field Generator that would allow them to survive adverse environments. Ryan also retrofitted an alien weapon he took as a trophy during his battles with the Reach. Giving his weapon the unfortunate name of "Bangstick" (which Giganta uses as the subject of much innuendo). Ryan uses the device to deliver powerful concussive blows while at full-size, propel him about in flight while reduced in size, and knock over all manner of things while he tries to pull off his Darth Maul moves.