I cannot think of a proper English words to describe Yuna's beauty. and here is one Chinese character, also her name written in Kanji
according to Wikidictionary
妍 (radical 38 女+4, 7 strokes, cangjie input 女一廿 (VMT), four-corner 41440, composition ⿰女开)
beautiful, handsome
seductive
the right side of the character means, openness.
and here is another Chinese character, I instantly associated with Yuna when I first saw her in person (she was wearing KoV makeup then) and when I saw her Adios opening pose.
媚 (radical 38 女+9, 12 strokes, cangjie input 女日竹山 (VAHU), four-corner 47467, composition ⿰女眉)
charming, attractive
flatter
and the right side of the character means eyebrows.
The beauty of Yuna's eyebrows, and that acting/connotation of her eyebrows (especially in Adios) perhaps, only a person with oriental cultural background can truly understand.
I'm surprised that, of her 4 programs after her comeback, Les Mis is the most popular of them. Don't get me wrong, I LOVE that FS, but SitC & KotV are such special music choices & her Adios Nonino is so underappreciated imho. I wish they all were recognized as being as special as they are in my eyes 
sometimes we forget they were this young as if they never aged 
I cannot stop rewatching her programs. 
:
)
