Yes, Storm is very important, and has become the central part of the group. Ambercat has a great personality, but he was taken from his mom way too early. If it wasn't for Storm, he'd be a very different cat. Storm tempered him into a well-adjusted cat, in the nick of time.
You are a lucky man that you rescued Storm. He is such a nice Boy and makes it much easier to intergrate a new cat into the "pack". He is very helpful !