Science Ninja Gatchaman Jun Cosplay (科學小飛俠)
Science Ninja Team (aka Gatchaman, G-Force, 科学忍者隊; 科學小飛俠) is a Japanese cartoon from 1970s. You can see a video at Childhood Memories: Japanese Cartoons of 1970s: 小蜜蜂，小甜甜，海王子，北海小英雄，小天使，小英的故事，無敵鐵金剛，科學小飛俠，恐龍救生隊
Jun (白鳥), is the only female member, of a team of 5. That yo-yo is her trademark weapon.