Or a good one.

Purrspective
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Robber to Alfyn Relation
Robber sees Alfyn as a light at the end of a tunnel. A tunnel that he has been traveling for as long as he can remember. A dark and awful tunnel. A tunnel that, while he's learned to live within and even navigate well, he seeks to escape.
He has a fear that once he makes it out, he won't know what to do. Every facet of himself was forged by this tunnel, including his identity and way of life. It is unnerving to think about what life would be like once he escapes, so he is hesitant.
But in his heart, he feels like he not only wants Alfyn, but needs him.

He can get annoyed at the cat's antics, but also finds a certain thrill comes with the challenge of reigning in the cat. Because Alfyn is so used to getting what he wants, it gives Robber that much more satisfaction to put the cat in his place.