• English / United States: Professor Sada
• Japanese / Japan: オーリム博士
• Japanese (TL) / Japan: Olim-hakase

Professor Sada was one of Paldea's leading Pokémon Professors, as well as a top graduate from Naranja Academy. She appears only in Pokémon Scarlet. Professor Sada was Arven's mother, and was fascinated with the idea of Ancient Pokémon and ancient times from a very young age due to reading all about it in the Scarlet Book. She had worked in the Great Crater of Paldea to create a Time Machine that could send Master Balls to ancient time periods to catch them and send them to the present. However, when she brought two Koraidon to the present, they got into a territorial struggle in Research Station No. 4. Sada put herself between the two, and was killed. The Professor that the player, Florian or Juliana, talks to throughout the games is actually an AI the Professor created to look like her, an AI that maintains the time machine that is referred to as "AI Sada" (AI オーリム). The AI doesn't understand how bringing Pokémon from a different age would be good for the ecosystem of the present times, and asks the player to put a stop to it. However, this causes protections to be put in place coded by the original Sada to activate, causing the player to fight the AI against it's wishes.