Nahlaas

Quick portraits of my favorite OC. I already wrote their backstory there, but I'm gonna copy-paste it right here:

Nahlaas (who was nameless at the beginning) was created by Værmina to be the Skull of Corruption. Just like in the game, they began feeding themself without any outside help to the point of gaining a counsciousness and being able to talk. Meanwhile, Siltafiir (my Dragonborn) made a pact with Værmina half-willingly and was therefore obligated to save the Skull from Erandur. They travelled together, became friends, decided to cooperate to free each other from Værmina and Siltafiir gave them their name (Nahlaas means "alive" in the dragons' tongue).
After some very very very long adventures that involved the Thieves' Guild, the main quest, both DLCs and so many other things, Siltafiir freed Nahlaas from their useless "body" (if a staff can be called a body) and helped them get into another. This new body originally belonged to a Dunmer who had tried to get Siltafiir assassinated, so don't feel too bad for her, she had it coming.

Now, about their personality:

Before obtaining their body, they've spent years eating memories, so they know how mortals interact and all. That said, they don't really care about appearing normal, they're more interested in eating as many different foods as possible, smelling all the flowers they find, dancing on all the songs and just using that body to its full extent. That's what happens when you're stuck in a staff for hundreds of years, you need to compensate.
The downside is, by eating isolated memories, they haven't learnt to develop habits, like always wearing warm clothes in winter, sparing their energy when faced with a difficult task and not eating too much even when the food is delicious - never give them mead because they do not know their limits. They also fall asleep in ridiculous places, as they haven't learnt to listen to their body's needs and just do stuff (like singing, dancing, playing games, touching everything…) until they can't do it anymore.
As for their abilities, since they've been created by Værmina they can't use the magic from Aetherius, but they can use the one from Oblivion. They also kept their original powers, like summoning black flames that burn the mind of their victims and reading and eating memories (though they don't do the eating part often because Siltafiir forbid it).
Tailking about Siltafiir, they love her more than anyone else, as she's the one who gave them that body. They mostly feel indifferent towards other mortals and only show interest in them when Siltafiir does. In short, they're selfish.