Seung-ah-G218

Petty Officer Second Class Seung-ah-G217 is a of the.

Early Childhood
Yoon Seung-ah was born on Reynif in 2535. Her mother was killed when attacked her home planet in 2546, while her father was fighting Covenant forces on elsewhere as a. She was rescued by Dom-094 and was then conscripted as part of the. She was trained by, , and and  on. During the early stages of training, she was more clumsy than the other trainees and her combat performance relative to her peers did not get much better.

Battle of Earth
Seung-ah was assigned to Team Dao along with Henry-G066, Jim-G067, Fred-068, and Irene-G304 by 2552. Along with Sam-015, the SPARTAN-III team was aboard the UNSC Ballista during the. The SPARTANs defended the frigate from boarding Covenant infantry. While treating a wounded marine, Seung-ah was shot in the back by a. Jim quickly rushed her to the ship's cryo facilities and froze her in a. When the Ballista took extensive damage, her cryo chamber was ejected along with others and landed on.

Her cryo chamber was recovered by UNSC forces. Her right lung was replaced with a newly flash-cloned one. Because of her condition, Seung-ah could not participate in the. She was disheartened to tears when she received word that the rest of Team Dao went on the Ballista. Soon, however, Henry, Jim, Fred, and Sam were recovered from Africa, having escaped the Ballista in an moments before the frigate's destruction. Irene was unfortunately killed in combat on the surface.

Timeline Divergence
In Against All Odds, the rest of Team Dao is replaced with unnamed Gamma Company SPARTAN-IIIs who all died aboard the Ballista; Sam-015 was the only SPARTAN survivor on the frigate.

Platinum Team
After fully recovering in 2557, Seung-ah was placed into the Platinum Team, only to be unexpectedly reunited with Dom-094.

Personality and Description
"I never believed in deities until now."

- Dom-094

Seung-ah is best known for her ability to keep almost all wounded allies alive long enough to receive proper medical attention, regardless of how terrible the injuries are. Not only is she able to temporarily treat wounds to the best of what is possible, but she verbally gives incapacitated allies the will to live. Those who have been treated by her describe her as "an angelic, reassuring presence" or "giving off a soothing aura."

Like all Gamma Company SPARTAN-IIIs, however, Seung-ah is unrelenting to her enemies when provoked, due to the 009762-OO drug that was injected into her during, and ultimately must take regular doses of 009127-PX and 009927-DG to prevent uncontrollable aggression.