Eris is a singing, guitar playing villainess with the power to alter people's thoughts, moods, and behaviors through the use of her Strife-O-Caster guitar. She found that working with Calypso, a woman whose singing itself does the same thing, enhanced both of their abilities, so they teamed up as the Dischords. She "appeared" in a non-speaking role in S02E03 of the show.

Eris | My Amazing Woman Wiki | Fandom

She wears "hair band" style hair and outlandish makeup. She is a little more aggressive and forward than Calypso. Her name is a callback to the goddess Eris, although, like with the Mighty Herakles, we're not sure how directly related she is.

The character will have to sing in the episode, but just one tune, in conjunction with Calypso.