Maki Ikuta, nicknamed Makio, is a first year student at Umineko Shōgyō High School and a member of the school’s swimming club.
Makio is a small girl with a childlike appearance, often mistaken for a middle school student. She has short dark hair and larger eyes than the other characters. When she freaks out angrily she has a third eye on her forehead.
She is a cheerful, optimistic and lively girl. She joined the swimming club without knowing how to swim, thinking that would be the best place to learn it. Even though her progress is slow, she does not give up or get really depressed about it. She has the habit of referring to herself in third person. She wishes she looks more her age and especially wants bigger breasts. Together with Maaya, who has the same insecurity about her breasts, she forms an alliance, hoping to find a way to make their breasts grow.
Makio is the first swimming club member to spot Amuro’s houseboat approaching and runs to the pool to fetch the others.
After graduating from high school she really got into triathlons and she has won many competitions.
She is a terrible swimmer. At the beginning of the series she can swim for about 5 meters …with a kickboard. She slowly improves throughout the series.