expression, suru verb (irregular)
be pleased; be in a good mood
Describes becoming or being pleased, often because of a compliment, good news, or a favorable outcome. Used as a suru-verb phrase.
彼は褒められて気をよくした。
He was pleased after being praised.
その知らせを聞いて、彼女はすっかり気
Upon hearing the news, she was in a very good mood.