Gudetama

Gudetama is the yolk of an unfertilized egg, devoid of gender. Gudetama is often depicted reclining on an egg white or as an ingredient in a Japanese dish. Gudetama’s main trait is laziness. Gudetama has crippling depression.

His name is a play on "gude gude"; used to describe someone with no energy or strength and possibly tama from tamago (egg).

Gudetama debuted following a contest run by Sanrio to introduce new characters based on Japanese food, in which Gudetama came second to KIRIMI-chan (a salmon fillet).

(Source: Wikipedia, Sanrio Wiki)