Catzi is said to be the oldest. Other sources report her as the youngest, with Bertie as the next youngest, then Avery, then Prizma as the oldest. It is clearly said in the anime that Prizma is older than Avery. If it is to be believed that Catzi is the oldest and not the youngest, then the order would be, from oldest to youngest: Catzi, Prizma, Avery, and Bertie.
Eventually, the Negamoon Sisters and Rubeus faced off against the Sailor Scouts. Catzi fought Sailor Mars, Bertie fought Sailor Mercury, Avery fought Sailor Venus, and Prizma fought Sailor Jupiter. They were forced to retreat when Sailor Moon gained the upper hand on Rubeus.
Eventually, they all turned good and were healed by Sailor Moon with Moon Crystal Healing Activation: First Catzi, then Bertie, then Avery and Prizma. They opened a cosmetic shop following this.