Heo Ma Hong attracted attention in the October 17 episode of Vietnam's Masked Singer, according to VnExpress.
The character's performance of Cam ky thi hoa prompted discussion of vocal technique, but the singer's identity remained unconfirmed.
Performance fuels speculation
The arrangement combined rock with folk influences, with the character performing on a suspended swing.
Tran Thanh described the singing as carefully trained and suggested that the performer might be altering the voice deliberately.
Tang Duy Tan also commented on apparent stage experience.
Those are panel interpretations, not verified biographical information. Names suggested by advisers or online viewers remain guesses.
Bao Anh and Tang Duy Tan joined regular advisers Tran Thanh and Bich Phuong as five Group C characters made their entrances.
Voting without an elimination
Cao Boi Lang also generated discussion through a rock-influenced performance and a speaking voice that surprised the panel.
At the end of the round, Khi Xu Mi led Group C with 26.67 per cent of audience votes in the figures reported by the article. Heo Ma Hong followed.
No contestant was eliminated, so the characters continued into later episodes.
The voting result does not settle the season's final positions or reveal a hidden identity.
The confirmed developments are the performances and published round results. The central identity question remains part of the programme's unresolved format until an official reveal occurs.