Yotsuba Koiwai (Japanese: 小岩井 四葉 Koiwai Yotsuba), also known as just Yotsuba, is the main character in Yotsuba&!, as well as the manga "Try! Try! Try!", both by Kiyohiko Azuma. As the title character of the series and almost every chapter, Yotsuba is usually the focus of each chapter; most stories revolve around her meeting, and often childishly misunderstanding, a new concept or activity indicated in the chapter title. She is noted for her childish energy, unusual naiveté, and iconic appearance.