Nidell was a Halanan female from New Halana and the daughter of a local dignitary on the planet. She was the ninth and last wife of noted Federation terraformer Gideon Seyetik. Nidell met Gideon during the unveiling of a statue dedicated to his honor after he had finished terraforming New Halana. She was, according to Gideon, infatuated with him from the start. He promised that he would show the galaxy to her, which was a very enticing prospect as she had never left her world. She enjoyed her time with Gideon, but, like his past wives, she eventually became unsatisfied. However, she would not leave him, due to Halanan custom.