Her pleasantly nasally, distinct voice has that ache and yearning in it that comes across. She can do slow ballads, mid-tempo ballads, fast-tempo songs and not lose its beat for second. The "nasal" in her voice is pleasant and emotive, not like Chungha's who's over reliant on the falsetto to mask the unpleasantness of her nasal, if you will.
Check out Yujin's voice in action here, where she basically took over the song-- where her vocals blend so well, is so complicit with the very evocative up-tempo melodies here:
Check out Yujin's voice in action here, where she basically took over the song-- where her vocals blend so well, is so complicit with the very evocative up-tempo melodies here: