Ai

あい

Ai, the eldest of the trio, is a motherly 18-year-old sister. She frequently wears a Santa-style hat over her green hair and is the only major character with large breasts, a detail her youngest sister, Mii, often points out. Ai is severely nearsighted and needs glasses to see properly.
Ai is a terrible cook, yet this unfortunately does not prevent her from cooking. Daichi, a young boy the girls encounter during their travels, is the only person willing to eat her meals. Ai has a heart of gold and is always prepared to assist those in need. She appears to be the de facto caretaker of the sisters' pet ferret, Unagi. She also enjoys relaxing in bubble baths. Ai is accustomed to traveling and not aging, handling it with ease and remaining largely unaffected until she meets Daichi as an adult.
Ai possesses the unique ability to communicate with plants, which leads her to frequently spend time talking to dandelions, which she and her sisters call "popotan". These plants help guide her on her family's quest to meet Shizuku.