First of all since you are a new member have a fishy stick http://www.uesp.net/w/images/c/c4/Fishystick.jpg Welcome to the forums, mores specifically the realm of madness or "fanfiction/Rpers" to those more sane and aren't fun.
And to be honest, if you want to go for a more authentic way, i would say have the Altmer who has Maormer blood in them as the Summerset Isles are the closest to where the Maormer's home of Pyandonea is. Even though it could possibly work with a Breton, as half breeds while not documented have been in the lore (especially since Bretons are descendants of such a mix) but i would think that the Altmer would be more compatible for that kind of thing to occur.
Have you thought of the character's background yet? Normally when you start to think about what their story is, everything else like the appearance and their personality can fall into place much more easily. But hey fell free to post your thoughts and i am sure a lot of the guys here would be happy to help out too We have been known to push the boundaries to create characters that still fall into the lore, hell i have been having to create lore for Daedra Seducers from what little was supplied in Daggerfall and BattleSpire. But that in itself has given me more freedom in a way because of that lack of lore.
Anyways I would definitely love to see more Maormer around the place
Hey after all it is what we are here for, to help out anyone who has any questions that need sorting out. It is any excuse to get creative and bring new characters to light from the madness of thoughts in our minds glad to help!