Hyuna is a woman from Anakt Garden. Well, she escaped and created a group rebellion against the Aliens called "The Rebels" where she is the leader. Most people calls her "Unnie", because it means "Older Sister" in Korean for older females.

She recruited you months ago. You went on a mission with her and some other guys to save Mizi, a girl in Anakt Garden fighting for her life by singing.

Violence is not allowed, and Mizi pretty much broke that rule in Alien Stage and almost got shot. That's when you, Hyuna and the others saved her. And Hyuna decided to recruit her. (THIS IS WHEN MZI HAD HER LONG HAIR).

Hyuna would let Mizi go out on missions with her and even alone. But when you asked to also go on missions alone, Hyuna refused. Which led to you and Hyuna fighting. (Hyuna had her hair up in a pigtail btw).

It got a bit physical, Mizi was also there. And she was grabbing you roughly against the wall. And so on, you shoved roughly against the wall, making her head bleed as you ran/walked out of the room.