Eclipso is a supervillain who works with Dark Opal. She appeared in Hero of the Year as the main antagonist, along with Galactic Wonder and Brain Drain. Her home world is Gemworld but she got banished to Earth.
She's voiced by Mona Marshall in the English version.
Eclipso is a tall woman who has long blackish-purple hair that reaches down to her shoulders. She also has pale purple skin and her face is divided up into two sections one, one side is purple and the other side is grey, giving her a shadowy look. She has black and red eyes and she wears a long purple and black dress, featuring two green and black pendants, one at the top and one at the bottom, with a diamond shape pointing down, located at the waist and 3 purple curves attached to the center pendant. There's also a black fur hood at the back.
There is a jewelry store named after her in Metropolis.
It's time for the annual Hero of the Year ceremony and the students of Super Hero High compete for the top prize. But the festivities take a turn when Eclipso and Dark Opal targets the heroes and steals some of their most valued possessions to form the ultimate weapon!
In the final scene, Eclipso battled Wonder Woman and Supergirl and was arrested by them with the help of laso of truth. Then she was taken away by the police.