flighty

When she returned for Season 3, she was slightly more magnanimous and less flighty, trying her best to achieve harmony with the rest of the cast.

"Today’s young women know that neurotic isn’t cute. Cute isn’t cute. Neither is flustered, madcap, zany, flighty, flaky, harried or hapless - all adjectives that apply to Bridget."

Wrens "are very flighty," he says with a laugh.

I’m strolling through the neighborhood, trying to get eyes on a flighty hummingbird, when I reach the corner.

Tristán, vain and flighty, can hardly concentrate on anything but his career.