What kind of girl is a bird swimming in six flowers?

The Wandering Birds is a fantasy girl in Grade 2. According to relevant data, Liu Hua, a bird friend, is a character who "falls in love with middle school diseases". She is a classmate of Togashi Yuuta. She became his girlfriend because she made a love contract with her. Because of Togashi Yuuta's infection, she became a middle school student. She will make some exaggerated behaviors in daily life or on campus without fear. She is afraid of her sister.