Fiona from Adventure Time

A woman dressed in a costume inspired by Fiona from Adventure Time, with long blonde hair and a blue dress featuring green accents on the shoulders. She wears white knee-high socks with light blue stripes at the top and black shoes. Her hands are raised to her head, holding up a white hat shaped like rabbit ears, complete with fluffy white fur inside. The woman stands in front of a blurred background, surrounded by people dressed in various costumes, suggesting that she is attending a costume party or event.