Hyolyn gave warm encouragement to Brave Girls' Min Young, a junior of the same age, who ranked last in the last competition and is on the verge of being eliminated.
Mnet's "Queendom 2," which aired on April 28, depicts the cast preparing for the third competition.
Hyolyn, who previously won first place in the first and second rounds, chose Brave Girls' main vocalist Min Young in the process of forming a vocal unit team.
On this day, Hyolyn selected Bolbbalgan4's "To My Youth" as a song to perform as a duet with Min Young.
This was because he wanted to comfort Min Young, who had been living fiercely, before the Brave Girls saw the light of "Rollin" reverse.
While practicing together, Min Young showed hesitation when Hyolyn suggested singing a key higher to give an impact on the stage.
Min Young smiled bitterly, saying, "I'm greedy myself, but I think I'll ruin the stage if I make a mistake."
Hyolyn asked Min Young why she thought of making a mistake first and then encouraged her confidence, saying that she could cover it even if she made a mistake.
In a later interview with the production team, Hyolyn also expressed her feelings that she was upset by Min Young saying as if she had lost confidence.
Hyolyn said, "I was a person who didn't feel discouraged wherever I went. But it wasn't because I was good, but because I debuted at a small and medium-sized agency, I wanted to turn the tables on myself."
Hyolyn explained that even when she was active as an idol group Sistar, she always told the members not to be discouraged and that she seemed to have spoken more strongly to Min Young because of such an experience.
Hyolyn felt even more sorry because leader Min Young shed tears and looked intimidated as the Brave Girls were on the verge of being eliminated after finishing at the bottom of the first and second rounds.
Min Young, who listened to Hyolyn's advice, regained her confidence and sang in a high range, and many viewers applauded.
Hyolyn and Min Young's duet stage will be available on Mnet's "Queendom 2," which will air at 9:20 p.m. on May 5.