I think that it would be best to change the character's name to suit Keeper traditions if you're wanting to change that character to be a Keeper rather than a Seeker. Or, you could just remain a Seeker and still feel a greater affinity for the moon than the sun. Just because your character feels closer to the moon doesn't mean their heritage needs to change. Just as real human beings are generally diurnal, there are some insomniacs among us, even though some of our ancestors really worshiped the sun. You could be a bit of a rebel among diurnal folks, as a Seeker who cares more for night than day.
I do not agree with the idea of making a Keeper avatar with warm-toned skin and calling it a Seeker, though. Skin color is not all that distinguishes a Keeper from a Seeker. Keepers have fangs, round pupils, larger ears, and longer, skinnier tails. Seekers have vertical slits for pupils, smaller ears, shorter tails, and no fangs. If you're going to be a Keeper, be a Keeper. If you're going to roll a Keeper but call it a Seeker... well, please don't. >.>
I do not agree with the idea of making a Keeper avatar with warm-toned skin and calling it a Seeker, though. Skin color is not all that distinguishes a Keeper from a Seeker. Keepers have fangs, round pupils, larger ears, and longer, skinnier tails. Seekers have vertical slits for pupils, smaller ears, shorter tails, and no fangs. If you're going to be a Keeper, be a Keeper. If you're going to roll a Keeper but call it a Seeker... well, please don't. >.>