Eris is Pluto's twin sister, and she is usually grumpy and short tempered. She would get angry about almost every single thing, either big or small. In Haumea’s Egg Idea, she told Haumea to throw away the spawn eggs when she doesn't want to. Her only moon is Dysnomia
Unlike her brother, Eris is grumpy, mean and pessimistic. She would get angry on almost every single thing, like when Makemake is about to place Triton behind her but she doesn't want to lose her rank as the coldest