
With regard to Doman names for non-Au Ra, I would point you to the NPCs you encounter in the initial (30-50) NIN questline. Your quest giver is named Oboro Moonrise, though there's also a woman with him named Tsubame Sunrise that you interact with. Your opponent in it is named Karasu Redbeak, and they were trained under a Master Gekkai. All of whom are Midlander Hyurs, so it should be safe to assume that a naming style akin to Yugiri's should be fine.
As for tattooing, we do know that tattoos exist, given the ones you can put on your character's face and the various outfits that "give" various types of tattoos (the one that jumps to mind is one of the Rogue/Ninja ones). And characters from 1.0 actually have a tattoo on their upper back as an identifying mark. So, we know there are ways to obtain a tattoo... just not exactly the details on how it's done. You can change your makeup/tattoos/etc at the aesthetician, so I suppose that would fall under their wheelhouse?
Still, if you want to play a tattoo artist, I'd say go with however you want it. Just a quick Google search on tattooing, in fact, provides a possibly interesting angle considering you're talking about a Doman:
"Traditional Japanese tattoos (irezumi) are still "hand-poked," that is, the ink is inserted beneath the skin using non-electrical, hand-made and hand held tools with needles of sharpened bamboo or steel. This method is known as tebori." - from the wiki
Might be an interesting starting point. Perhaps including some magic to either aid in the process itself (heating needles with fire crystals) or in the recovery (light healing to avoid tenderness and swelling) could add a very unique Hydaelyn flavor to it. Just have fun with it, really.
As for tattooing, we do know that tattoos exist, given the ones you can put on your character's face and the various outfits that "give" various types of tattoos (the one that jumps to mind is one of the Rogue/Ninja ones). And characters from 1.0 actually have a tattoo on their upper back as an identifying mark. So, we know there are ways to obtain a tattoo... just not exactly the details on how it's done. You can change your makeup/tattoos/etc at the aesthetician, so I suppose that would fall under their wheelhouse?
Still, if you want to play a tattoo artist, I'd say go with however you want it. Just a quick Google search on tattooing, in fact, provides a possibly interesting angle considering you're talking about a Doman:
"Traditional Japanese tattoos (irezumi) are still "hand-poked," that is, the ink is inserted beneath the skin using non-electrical, hand-made and hand held tools with needles of sharpened bamboo or steel. This method is known as tebori." - from the wiki
Might be an interesting starting point. Perhaps including some magic to either aid in the process itself (heating needles with fire crystals) or in the recovery (light healing to avoid tenderness and swelling) could add a very unique Hydaelyn flavor to it. Just have fun with it, really.