Aimee Mann is an American rock singer, songwriter, guitarist, and bassist. She voices Opal in the episode "Giant Woman", the only episode in which Opal has spoken.
- Aimee Mann is one of Rebecca Sugar's greatest musical inspirations. This is most likely the reason she was acquired to voice the character Opal.
- Mann's song "It's Not" from her 2002 album Lost in Space has been noted as one of Rebecca's biggest inspirations for creating comics and cartoons themed around space.