in the new season they could introduce Grant as a thief. doesn't have to be a pirate.
they already took some creative liberties with CVIII not in the original.
they could have Grant at least in one episode be badass, and killed off if they don't want to juggle more characters than they can handle, would be proper respect to one of Castlevania III's essential and canon characters. the animated series is incomplete due to their narrow minded opinion about Grant, if their occupation doesn't fit the location, then change them to thief. simple. and he's dressed like a thief, even uses a knife.
Order of Ecclesia would be interesting for a animated series, though they already have their hands full with the current one.