Perhaps drop the "daughter of an Octarch" bit and make it "daughter of a wealthy Hydlaa merchant" :] It would be far more believable. I don't know how you can hide anyone in the Arena though, it's not that kind of place. How can the monster "allow" only one warrior at a time, as well? Is it an enchanted, magical beast? Tefusang aren't really known for their intelligence, so something of a magical nature would help you plug the gaps. Give us some detail to how the kidnapping was done :]