>>92517417It's apparently supposed to represent "Glamorous." Though, it's probably just a simpler way of saying something more meaningful, like maybe "self esteem." Being comfortable with yourself, that sort of thing. Not necessarily mellow like green, but feeling good being in your own skin.
Of course, until we see an episode with someone growing a Teal tree, we probably won't know exactly what "glamorous" means in context.
Speaking of trees, so black trees represent... hopelessness? We saw that Kiyoshi activated a treasure when he was saying those trees can't protect his moon. But thus far the emotions only seem to act up when they're being felt for positive reasons. Stuff like Feisty for productivity, Sadness over another's misfortune etc. But, do the black trees work that way too? Would that mean Kiazuki's frustration over her failure stems from pride rather than an actual desire to do her job, and that's why she's never even grown a black tree?