Masoud's Daughter is a minor NPC in Octopath Traveler II. She gives Partitio a hint in his Scent of Commerce: Sai Route.
Story[]
When Partitio requests access to Masoud's famous Mercantile Manuscript, Masoud sends him off with the challenge to bring back Masoud the treasure he values most. Partitio assumes that Masoud's greatest treasure must be his daughter, so he hires her and brings her to her father. Masoud concedes that many people would consider their family to be their greatest treasures - but not him.
After this encounter, Masoud's daughter gives Partitio the hint that Masoud isn't asking what a merchant would want in general, but what is specifically most precious to Masoud himself. Thanks to this advice, Partitio realizes that Masoud's greatest treasure must be Masoud himself - and the experience, talents, and skills that he's learned along the way. Masoud accepts this answer and grants Paritio the key to his legendary archives.