Dandy

A man wearing a brown trench coat and hat that is seen running from the same police officer in almost every episode (almost like a Zenegata/Lupin relationship). It is never explained why the cop chases Dandy as he is never seen doing anything wrong and even helps out Ink every now and again.

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It is later revealed that he is the King of the Magical Kingdom and Mio's partner. He turns into the form of a small dog while still wearing his hat and has a lolicon fetish as well (drooling and having a nose bleed when Mio changes, a combination of Arc and Kaksu's reaction).

(Wikipedia)