I'm thinking of keeping this cat
Does your roommate have a problem with keeping the cat?
I mentioned it in an initial idea and then explained everything in detail and she is okay with it.
Animals provide companionship and they are great to have around, so it is good to keep one. It can help you lead a happier life.
I'd probably keep it even if the room mate didn't like it, but am still pleased they agreed.
Animals are like small children and in need of our care. If your room mate didn't like it before then they would like it after they spent time with it.