のんき者もの

noun

happy-go-lucky person; easy-going person; optimist

Describes a person who is carefree, relaxed, and not easily worried. Often used in a mildly positive or teasing way.

• 彼かれはのんき者もので、いつも笑わらっている。

  He is a happy-go-lucky person and is always smiling.

• のんき者ものだから、試し験けん前まえでも平へい気きだ。

  Because she's an easy-going person, she's calm even before an exam.