The first character to be depicted in the [i][[Getsuyoubi no Tawawa]][/i] series. On the series' seventh anniversary, she was featured for the first time since her debut and christened as the "Originator" (始祖 [i]shiso[/i]).

Also nicknamed the "Founding 〇〇〇an" (始祖の巨〇), a pun on the name of the Founding Titan from [i][[Shingeki no Kyojin]][/i] (始祖の巨人), as the omission of the last word's second kanji leaves it open for reinterpretation as [i]kyonyuu[/i] (巨乳, "huge breasts"), referring to [i][[Getsuyoubi no Tawawa]][/i]'s basic premise of revolving around female characters with breasts that are [[large breasts|large]] at their smallest. Incidentally, the pun also works in English, as the "tit" in "titan" is slang for a woman's breast.
shiso-chan (tawawa)