The Spanish cup-hilt rapier is available from "Spanish Main" onwards. Mind you, so are the basic rapier and duelling rapier, which I'm inclined to make available to "Early Explorers" because at least some rapiers did exist in the 16th century. But the Spanish cup-hilt rapier is rather powerful for a starting weapon. Ardent only gets it after surviving a difficult boarding and then duelling the captain, who got the cup-hilt rapier to make him a bit tougher! "Blade47", the light tizona, might be more suitable as a starting weapon.
Having said that, "Assassin" gives Johan Elting his special sword right at the start, while "Hoist the Colours" gives Jack Sparrow his special cutlass almost at the start. So, if Beatrice Devlin gets a powerful sword right away, she's in good company! As the cup-hilt rapier would be unique in "Devlin Opera" due to not normally being available in this period, you could have Emmanuel say something about it being special.
Having said that, "Assassin" gives Johan Elting his special sword right at the start, while "Hoist the Colours" gives Jack Sparrow his special cutlass almost at the start. So, if Beatrice Devlin gets a powerful sword right away, she's in good company! As the cup-hilt rapier would be unique in "Devlin Opera" due to not normally being available in this period, you could have Emmanuel say something about it being special.