Ceres- Pluto enjoys her company. She is like his ‘big sis’ whom he goes for advice. Ceres is the one that understands how Pluto feels the most because she too was reclassified a lot.

Eris- Pluto and her have a bit of a complicated relationship. She’s one of the reasons why he got transferred to the Dwarf Planet Club. She is a bit of a tsundere and won’t call Pluto ‘Big Bro’ because she consider them equals. She gets annoyed when Pluto doesn’t speak out what he really feels and it’s most of the time.

Makemake and Haumea- they are the newer members (especially Haumea). Pluto and Makemake get along quite well because they have some similarities in their personality and Makemake calls him ‘BIg Bro’.He runs off the Pluto whenever Haumea teases him. Because of this though, Pluto gets caught in the crossfire and gets teased along.