It is so cool! Now since you already have a character, the next big step is to use it in all your marketing purposes and make it as your overall image. Then if you started the signature campaign and having a great and constant popularity, giving huge money back to your users is a good return to keep the clients and users coming and not letting them be playing only your games but to let them play it with some perks and stuff. Art contests is also a great option, more specially those merch contests. Those where just my little cents in some future marketing strategies you might reconsider. Good luck!