デビュタント

noun

debutante

Refers to a young woman making her formal debut into society, often at a ball or similar event. Used in contexts related to high society or traditional coming-out ceremonies.

from French débutante

• 彼かの女じょは社しゃ交こう界かいのデビュタントとして華はなやかに紹しょう介かいされた。

  She was glamorously introduced as a debutante in high society.