Pluto's Angel is the inner goodness in Pluto's heart. He is the good side of Pluto's conscience, he is a supporting protagonist and made his first appearance in "Mickey's Pal Pluto".
Pluto's Angel first appears in the cartoon Mickey's Pal Pluto. After Mickey, Minnie and Pluto adopted stray kittens, the Angel appears and convinces Pluto to enjoys his new company. All of that changes when the Devil interferes and Pluto switches sides believing Mickey has left him for the kittens. When the kittens are trapped in the well, Angel attempts to convince Pluto to do right but is trapped in his halo by the Devil. Having had enough, he frees himself, takes off his wings and imprisons the devil in a trash can before telling Pluto to save the kittens.
Later on he goes to appear in the Oscar-winning short Lend a Paw. Like his previous appearance he stops the Devil from antagonizing Pluto and has him befriend a stray kitten. In the end the Angel congratulates Pluto for his good deed.
In the cartoon "Pluto's Kittens", the Angel returns as Pluto kicks out some stray kittens after Mickey blamed him for the mess they caused. The Angel demands Pluto to rescue them which he does after nearly watching them drown. In this cartoon, he is given a blue color and his wings are short. He also made another appearance in "Minnie Takes Care of Pluto", telling Pluto that Minnie has, always and will love him with care.
Pluto's Angel makes a special appearance in the episode "Pluto Vs. Figaro". When Figaro acts to playful for Pluto, the Angel informs him that he must be patient with his assistant.