A character from [i][[Getsuyoubi no Tawawa]][/i]. Presently the most frequently recurring character in the series, as well as the main character of the short [i]Getsuyoubi no Tawawa[/i] manga released at Comiket 89 and the first female protagonist of the ONA series.

She is 149 cm tall and has a weight of 50 Kg[spoiler], of which her breasts weigh 5 Kg[/spoiler].

Most of her appearances so far have to do with her [[large_breasts|large breasts]], and often involve "[[Onii-san_(tawawa)|Onii-san]]" as well.

She is called "Ai-chan" (アイちゃん) in the manga [spoiler]due to her bust size, which is "I" cup. This measurement increases over the course of the series, and so she later suggests to be called "J-chan" (ジェイちゃん). As of "16 January 2017":[/posts/2600246], her bust size has broken the 100 cm mark, making it K-cup.[/spoiler]

She is voiced by [[Harada Sayaka]].
アイちゃん(月曜日のたわわ)