Though he does not appear to physically age, Mr. Popo is very old; having served Kami, the Guardian of Earth, for hundreds of years, also serving Kami's predecessor, as well as guardians of the Earth into the distant past. Being the loyal and faithful servant that he is, his "job description" and usefulness covers a wide variety of areas, such as tending to Kami's palace and grounds, keeping the Lookout clean, training Earthlings and other creatures to deal with especially dangerous enemies of the planet, taking over the lookout when the guardian is away, odd and interesting things such as helping to reconstruct Shenron if needed, and most importantly, supporting, serving and taking care of the current Guardian. He always has a deep emotional bond for the Guardians of his time and will become incredibly depressed or worried if they undergo any harm. He also tends to the ancient butterfly garden that he planted thousands of years ago, and enjoys the more simple things in life.