Binchou-tan

Bincho-tan (びんちょうタン, Binchōtan) (also Binchō-tan) is a mascot character, created by mangaka Takahito Ekusa (江草天仁, Ekusa Takahito) and produced by game goods company Alchemist.
The name is a play on words: binchōtan (備長炭, binchōtan) is a kind of charcoal, which is mainly used for cooking. However, -tan is a suffix created by the mispronunciation of chan. Relating to this dajare, the main cast is the moe anthropomorphic representations of different types of charcoal.
(Source: Wikipedia)