Iyami is a very flashy and mischievous man who claims to be from France. His most notable features are his 3 large buckteeth, his thin moustache, and his Beatles-style haircut. He refers to himself in the first person as Me (ミー mii?) and other people as Chimi (チミ?) and usually ends his sentences with ~zansu (〜ザンス?). His trademark pose of flexing his arms and legs and shouting Sheeeh! (シェー?) became a popular trend all over Japan. He was modeled after Japanese vaudevillian Tony Tani. He is usually single and is unpopular with women. His occupation and role in the series often changes. In his first appearance he was a doctor. He has also been a teacher at Osomatsu's school, a co-worker of Matsuzō's, and even a police detective pursuing Chibita, but he is almost always actually a con artist or beggar. Early on in the 1988 anime he is officially a salesman, but this is eventually discarded and he begins to appear as corrupt doctors and other such things. It is often hinted that not only is he not actually from France, but also that he probably has never even been there. Such hints include trying to eat the shells of escargot and being corrected about French facts by students who have been to France. Iyami has become the character most associated with the series, even more so than the sextuplets (much like Papa in Akatsuka's other hit series Tensai Bakabon). The opening to the 1988 anime series focused more on him than the sextuplets, and the ending credits featured the sextuplets and Dayōn performing his "Sheeeh" pose. In "Osomatsu-kun Grows Up", Iyami works as a bartender at the bar Osomatsu usually goes to, having gone to America to learn the trade. His name comes from iyami (嫌味?), which means gaudy or disagreeable.