She has turquoise eyes with short dark hair except for long bangs and a small, knee length ponytail. She dons a black pantsuit with white blouse. She is always seen with her husband An Sangeen.
She is a hotheaded person, prone to anger with passion for her country, leading her to investigate the big explosion (caused by Frankenstein and Rael Kertia ) despite strict orders from her higher ups. Yonsu has a deep love for her country and her comrades as she was seen crying after the Cerberus attacked the KSA and many members were killed.
Na Yonsu is an experiment conducted in Korea without the Union headquarters acknowledgement, so her abilities are kept a secret. She is married to An Sangeen.
- The KSA agents maintain complete collaboration with the trio, informing them every news they get from the Union. On one evening, they notice a chaos in the city alleys and inform the trio. But before either group arrive at the spot, Rai, Regis and Seira find a fleeing experiment desperately fighting his pursuers. When the KSA agents arrive, Regis has already taken care of the pursuers and the agents take the experiment to their treatment faculty as Rai seems to know the modified human. Later the trio arrives there to find that the modified human is M-24.
- In the following arcs, Na Yonsu and An Sangeen are rarely shown.
- Na Yonsu is present when Lunark visits the KSA Headquarters looking for Frankenstein.
Powers & Abilities
She is a modified human and shows characteristic strength. Even with the minimal application of her power, her attack left slight signs of impact on M-21's palm. Though she couldn't injure M-21 but she was able to fight on par with him for sometime.
Unlike Sangeen, who materializes his energy, Yonsu imbues her aura in her limbs to enhance her attacks.
|Rai's Group||Rai · Frankenstein · M-21 · Tao · Takeo · Shinwoo · Ik-Han · Yuna · Suyi|
|Nobles||Raskreia · The Previous Lord · Gejutel · Karias · Krasis · Kei · Ludis · Rael · Ragar · Rajak · Regis · Rozaria · Seira · Claudia · Edian · Gradeus · Ignes · Lagus · Roctis · Urokai · Zarga|
|Werewolves||Muzaka · Maduke · Lunark · Kentas · Ashlyn · Garda · Dorant · Juraki · Grui · Gaitan· Kuharu · Mount · Drakon · Kaiyo · Gayare · Mirai · Urne · Uzhir · Gorma · Krano · Braang · Zaiga · Gaura · Gotaru · Bashum|
|Union Elders||1st Elder · Maduke · 3rd Elder · Roctis ·Lunark · Urokai · Zarga · 8th Elder · 9th Elder · Rostere · Muar · 12th Elder · Dr. Crombel|
|Union Agents & Members||Dr. Aris · Bonerre · Geo · Hammer · Haydn · Ignes · Infected · Jake · Kalvin · Ked · Krantz · Lutai · Mark · Mary · Rodin · Shark · Taze · Yuizi · Yuri|
|KSA||Lim Taesik · Sangeen · Yonsu|