Udon-san is a Sanrio character who is a part of the Cogimyun Universe. They are a male Udon noodle. They are stubborn, curious, hard-working, and they hate losing. Udon-san lives at Cogimyucorpo apartments.

The series centers on the flour dough spirit <i>Cogimyun</i>, who actually really wants to be an onigiri. She takes care of her grandfather's apartment complex due to her grandfather being away. The denizens of the apartment are all "Kogimuko," which are all food that center on flour dough.
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(Source: AnimeNewsNetwork)