Those little ears are adorable!! I like that your OC has a slim tail. It's a refreshing trait to see as opposed to the constant big fluffy ones I'd typically see in a banner like this. It helps make it a more interesting image, given the hair has so much volume. They compliment each other well and make a great balance, even moreso with the wording to the left. The placement of the plants around your character was well done as well. They cover just enough and don't overpower the character. They help make for a more interesting image with the interaction going on there with your OC. You did awesome with this!

Thank you very much! <3