Manaka Mukaido from Nagi-Asu: A Lull in the Sea (Nagi no Asukara)
Manaka Mukaido Sailor Fuku Cosplay: The image features Manaka Mukaido, a character from the anime Nagi-Asu: A Lull in the Sea (Nagi no Asukara), dressed as a sailor fuku. She has long red hair and wears a white skirt with blue trim and a matching blue sailor collar. The outfit is completed by knee-high socks and brown shoes. Manaka's right hand is raised, holding her braid, while she sports a relaxed expression on her face. In the background, there appears to be a cityscape or urban setting, possibly with buildings and trees visible in the distance.
