Hyun Woo (현우) was a child who attended Anakt Garden. He was the brother of Hyuna. 

As they were both siblings, Hyun Woo and Hyuna were quite similar in appearance. Akin to his sister, he had tanned skin, grey eyes and brown hair. However, his hair had been cut much shorter than hers. The uniform he wore was similar to the uniforms of other students attending Anakt Garden. His uniform consisted of mostly white, wearing a v-neck shirt, and pants which went down to his ankles. Like the rest of the students, he had the round collar with a light at the front.

 Hyun Woo grew up with his sister, Hyuna. It appears he held a very strong bond with her, as he was always in close proximity to her. They were both friends of Luka, and all three of them would frequently spend time together, suggesting they were a trio.

Hyun Woo died as a child, possibly from blunt force trauma after his head landed over a rock. At the time of his death, Luka was also there, laying injured beside him, implying they may have fought.