Poised

having a composed and self-assured manner.
"not every day you saw that poised, competent kid distressed"
synonymes : self-possessed, self-assured, composed, assured, self-controlled, cool-headed, calm, cool, cool, calm, and collected, at ease, tranquil, serene, unperturbed, unruffled, impassive, nonchalant, confident, self-confident, dignified, equable, imperturbable, suave, urbane, elegant; Plus
having a graceful and elegant bearing.
"she had learnt from the girls at the salon how to appear perfectly poised"

"she had learnt from the girls at the salon how to appear perfectly poised