Origin

After figuring out Clark's dual identity she revealed to him that her real name was Nyxlygsptlnz. She's actually from the 5th Dimension and the wife of Mr. Mxyzptlk who is currently comatose due to his battle with Lord Vyndktvx. She's also the daughter of King Brpxz and Ferlin Nyxly's aunt. She seemingly lost her life getting shot by Nimrod The Hunter while trying to help Superman against Vyndktvx and the Anti-Superman Army.

Creation

Mrs. Nyxly was created by writer Grant Morrison and was first drawn by artist Rags Morales.

Note: During the Silver Age a character almost identical to Nyxlygsptlnz appeared in Superman's Pal Jimmy Olsen #52 under a slightly different name. Miss Gsptlsnz. She was responsible for reversing the Wolf-Man spell Mr. Mxyzptlk had cast on Jimmy Olsen. In recent years, the character briefly re-appeared in JLA (this time as Miss Gsptlnz) , written by Grant Morrison, and Countdown To Final Crisis once again as Mr. Mxyzptlk's girlfriend.

Other Media

Superman: The Animated Series (1996-2000)

A version of Nyxly would appear in the series as being Mr. Mxyzptlk's girlfriend, being clearly designed as a parody of Jessica Rabbit.

Supergirl (2015-2021)

Nyxly would be the main villain of season six of Supergirl played by Peta Sergeant. Starting off in the Phantom zone when Kara is trapped in the prison, she would help Kara and her father, Zor-El to get out, only to be revealed to be a psychopath. Nyxly was thought to die inside, but would escaped when Kara did only to be stucked in Nia's dreams, but would trick her into letting her out into National city. Nyxly would look for fifth dimesional totems, even going through the dimesional totem of courage which was revealed to be a trick, as she needed the courage to be vulnerable, this by going through a mental flashback to her origin, having been betrayed by her brother and given over to her father as a prisoner. Nyxly would end up in team up with Lex Luthor, who claimed to love her, the season would end when she spawned villains, Parasite, Metallo, Red Tornado and even Overgirl to fight the heroes, but would ultimately be defeated being sent back to the phantom zone with her bald lover boy toy.