Lost Son of the Dwemer
Build
Bosmer
Make Skin light as possible, toy with the face paint until it matches the skin color and resembles a Dwemer (Trust me it will)
Next pick a hair and beard type (Must have beard), toy with the face until happy. Make body stout and sturdy, all the way over on muscle mass or 1 notch before.
This character is male, feel free to make a female but I have no idea what female Dwemer look like.
NPC's will refer to you as a Bosmer or Wood Elf, this makes since on it's own but I will also provide reasoning below in the origin details below. Where a Dwemer to walk the roads of modern Skyrim even a researcher who has devoted their life to the Dwemer would simply think them another mer. Same if you saw a Snow Elf walking down the street you'd assume it was a pale Altmer.
Smithing and Enchanting are must have skills for any Dwemer, as for combat it is your choosing as Dwemer practiced short and long range combat.
And lastly even after reading this origin below remember this is your rp, your Dwemer is your character and not bound to the Dwemer of the past outside of blood. Fight, serve and live as you see fit, it is your choice.
Also the Origin I have created blends well into other Dwemer and even some Daedra quests. I wont spoil anything here but trust me I picked the right antagonist for your Dwemer character.
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Origin of the Lost Son.
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After the Battle of Red Mountain the Dwemer vanished from Tamriel. Yet extinct was not a true statement....
Yagrum Bagarn survived for ages in the Vvardenfell section of Morrowind, Yagrum survived because he was in another dimension at the time, an undescribed "Outer Realm", and had been looking for his people ever since with no success. Yagrum is believed to ahve died during the eruption of Red Mountian. Yet even him aside Dwemer spirits and spectre's roamed the land of Tamriel. The most famous being Dahrk Mezalf who haunted the ruins of Bthungthumz until meetings his fate at the hands of the Nerevarine.
What happened to the Dwemer? It's said even the Devines and Daedra do not know, and given the once thought extinct Snow Elves where found to be the forebearers to the Falmer it seems you can never really be too sure about life on Nirn.
The secrets of the Dwemer are a treasured item, even to a Daedric lord. Hermaeus Mora thirsted for their secrets, their knowledge, yet even he could not bring back the Dwemer who had vanished so long ago....However in a vault deep in the heart of Black Reach a human servant/cattle of the Falmer stumbled across a sealed laboratory. Old Hermaeus Mora was instantly intrigued, Mora promised this cattle freedom and knowledge for his service. The cattle worked tirelessly for his master until the seal was broken. Mora then gave the cattle his freedom but as he turned the corner the Falmer struck this betrayer, Mora's knowledge always has a price after all it seems.
What Mora found inside delighted him, secrets of the Dwemer's blood itself. He could create his own Dwemer, use him to discover those secrets he had longed for.
Mora grew his Dwemer Kin in the belly of a Bosmer women, and upon birth destroyed her. The child grew to advlthood in under a day and wondered the woods under the shadow of "The Throat of the World". Mora had given his Dwemer a old Alchemists shack and watched his mind grow and flourish. Yet Mora was displeased this Dwemer had been tainted by his mother. He was too much like a Bosmer, or perhaps his Dwemer blood which was kin to those who defied the gods themselves made his mind his own and not easily controlled.
Mora decided the only way to obtain these secrets was to let the Dwemer call to their lost son. He set his servants loose activating every Dwemer ruin in Skyrim. With this urge to explore his Dwemer side the lost son gave himself a name he found in a book and departed for answers. However near Dark Water Crossing he fell into a ambush at the hands of the empire, he was gagged and routed to a wagon for execution, forced the hold of Helgen he waited for some sort of salvation.
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Dwemer Names
Samples
Bthuand
Dumac
Kagrenac
Radac
Yagrum
Nchunak
Adding a ACK Sound (Spelled ac) seems to be on track. Just spitballing here but following the examples above names like Jthuack, Kynac, Kthrac would be hard to pronounce but not out of line. Then again this is a modern Dwemer, he might take a modern name.