Heloise was a chimpanzee in the circus of Armando. She had been in the circus for seven years and had given birth two weeks before Zira gave birth - the first chimpanzee born in a circus, according to Armando. To ensure the safety of her child, Zira swapped her infant child with Salome, the daughter of Heloise.
- Janos Prohaska, an expert in creating and acting in ape costumes, portrayed either Bobo or Heloise, or both.
- The first draft screenplay had Heloise and Salome share their cage with 'Abelard'. Presumably named after the famous doomed twelfth-century lovers Abelard and Heloise, he would have been the father of Salome. Another cage would have held 'Nero', a troubled chimp whose brain was out-growing it's skull. He would be taken away (euthanized?) by the time police came to search the circus a few days later.