Mr. Neptune

Mr. Neptune was like any other Mr. Saturn, except his name was slightly different. For this reason, he felt out of place in Saturn Valley. What he really wanted was happiness.
As he walked out of Saturn Valley, into the dark roads of Threed, and into Twoson, he saw his calling. It was an advertisement for Happy Happyism.
Mr. Neptune strutted carefully along, through Peaceful Rest Valley and into the blue village.
Mr. Carpainter gave him the role of gathering all the non-blue things and storing them in his colorful house!
As for Mr. Jupiter, they say he might live in a hidden cave at the Lost Underworld, but it's just a rumor...