Ai-chan "Amikomi-chan, Amiage-chan, Tawawa-chan"
About
During the day she attends high school and serves as the class representative. She also works part-time as a waitress at one of the Koubeya chain of bakery-restaurants where she wears the signature bowtie and tartan-pattern apron uniforms. She has a younger sister in middle-school who is also well endowed.
Ai-chan's name is a play on her bust size (cup size I) when she was first introduced. In later illustrations, she would eventually reach the cup sizes of J and possibly K. As of the latest illustration, her bust measurement is currently at 100 cm.
She prefers to be referred to as "Ai-chan" named after her cup size.
Rumors from the girls at high school speculated that she already had a cup size of F during 5th grade of elementary school.
(Source: Tawawa on Monday Wiki)