Hello everyone! I realize this question may seem a little silly, but I really would like some advice. I have a 3 year old female cat named Luna who is the love of my life. She has been the only cat since we got her, but she lived with a foster before us who stated that she got along great with other cats. The time has finally come to pick out a sibling for her, and I was wondering if there was a certain type of cat that would give the best chances of them getting along? (Ex. Male vs female adult, male vs. female kitten)? Or does it just completely not matter? She is very playful but likes to relax a lot too. Your help is greatly appreciated; thank you!