Melodia

The Mob’s gunner, and the only recurring female villain in the series. Her weapon is a keytar the show calls a Sound Smasher, and it fires pink laser sheet-music at people. There is no year but 1986 in which that sentence gets written down and approved!

She is the Mob member most willing to move against her boss. Two mutinies are on record, one with Yes-Man in No More Mr. Nice Guy and one with Poker-Face in Gangwar - Part I, and Mon*Star reinstates her both times with no visible consequence.

Two oddities are worth having. In Switch, where the storm inverts everyone’s alignment, her laser turns white, and that is a deliberate gag rather than an animation error. In The Great Galaxy Race her ship is disintegrated and she simply reappears afterwards with no explanation offered. The claim that her design comes from Cyndi Lauper is a fandom reading and not a production statement.

She is not in the pilot as a scene. That footage is shown while other characters talk about her, so Journey to Limbo is her first appearance proper.

Voice. Wikipedia and the ThunderCats wiki both credit Maggie Wheeler, on screen as Maggie Jokobson. She is the only woman in the block credit and this is the only recurring female villain, so the inference is about as strong as inference gets on this show. It is still an inference.