To the point the horn isn't named in the movie.This is truly baffling, honestly, and I wonder if Kira was added late in the production cycle? What version of the movie were those early trailers based on? Doesn't seem like there was that much reshoot for this movie either?
Maybe DnD is one of those movies that saved in the the Editing room and the whole 'we stole the wrong thing for the wrong people' realization added too much exposition and they just let people figure out the Red Wizard's plan on their own? I don't think the characters ever realize that Sofina got the horn from the Harper heist.
The trailers have to have come really early in the production cycle, because Kira and talk of her is like 30 minute of this film's run time and links into Holga's story so hard both literally and thematically, I have a hard time thinking she was a late edition. I will say, her and Forge's connection might be a late edition, for reasons I'd go into in the spoiler thread.