Murphy is introduced in The Little Detective, on episode 1.
He is a detective and a dog, and has some white hair. He wears a blue outfit with a red bow on top.
He loves eating bananas and loves playing fetch (of course, he's a dog) in The Little Detective it was said that he got kicked out from the detective group and went to Green Green Grassland but at episode 60, he was disqualified as a detective due to the bracelet incident and went back to Cui Cui Grassland to retake the position of a detective.
His history is unknown.