Thank you for your question, and sorry for the delay in answering! I had to give this one a bit of thought. Generally, if an object/pet/familiar could be apped in their own right, I prefer to leave the opportunity open. However I think in this case, considering how symbiotic their relationship is and the fact that separating them would make them difficult to play, I'll say it's fine for them to be apped as a unit.

Let me know if you have any other questions!