Entertainers sometimes get to bring on board guests for free but I'd imagine this is the last guest he will be allowed to bring and it might effect if he gets asked back or gets the contract renewed.
On my TA I had dinner with a guest and an 2 of the entertainers and the guest had to much to drink. He ended up trying to impress one of the girls with I can do anything I want attitude...he stole the iPad from the specialty restaurant where you order with it. Both of them where interviewed by security about any involvement and feared they would loose thier Celebrity contracts (one stayed on board for 6 months and one was a featured performer) just for being there. He returned it eventually and was told if he did anything else he would be left in the next port but still it was a big mess and this was just a guy they met on board not one they brought with them.