Ai, the oldest of the three, is a motherly 18-years-old sister. She is often wears a Santa-styled hat over her green hair, and is the only major character with large breasts, a fact which she is often reminded of by her youngest sister, Mii. Ai is very near-sighted and requires glasses to see clearly. Ai is an awful cook, but that unfortunately doesn't stop her from cooking anyway. Ai has a heart of gold and is always ready to help others in need. She seems to be the de-facto caretaker of the sisters' pet ferret, Unagi. She also loves to relax by taking bubble baths. Ai is used to the traveling and non-aging and takes it in stride, mostly unaffected by it until she meets Daichi as an adult. Ai has the unique ability to speak to plants which leads her to often spending time talking to the dandelions which she, and her sisters, refer to as "popotan". They help guide her on her family's quest, to meet Shizuku.

Popotan
Beautiful sisters Ai, Mai, Mii, their android maid Mea and slippery pet ferret Unagi make an amazing journey together through time and space without ever leaving their beloved mansion behind! Following the clues of the strange dandelion-like "Popotan," the girls are theoretically seeking the person who has the answers to their most personal questions, but they seem to have more than enough time to take side trips, meet new friends, visit hot springs and occasionally operate the X-mas shop they keep in the house along the way! Yet, the girls' ultimate destiny holds more than a few surprises of its own, and not every moment is filled with hilarity, as moving through time means having to leave friends behind as well.