Harry Olson is a supporting character in Atelier Ayesha: The Alchemist of Dusk, Atelier Escha & Logy: Alchemists of the Dusk Sky and Atelier Shallie: Alchemists of the Dusk Sea. Harry is a wealthy man who holds many notable titles, such as being the owner of Black Cat's Path and the organizer of the Treasure Trove Contest. He holds a great interest for history and relics, and also writes books. He loves things that other people, such as Marietta Muir, would consider to be "junk".