I'm making a CS, hold on real fast.
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Name Louis/Lucy
Age/Gender 22/Hermaphrodite
Appearance 
Race
Human
Spiritualism
What started his ascension was a tome. Looking for kindling, he has found many books before, and never bothered to know their contents. But upon obtaining this tome, he discovered ideals and realities that are so far unknown to his current world. He wanted to be the first to discover them, to show everyone what he knew. He wanted the glory and the power that came with being one of the most knowledgeably people of the world they lived in. And not through magic or faith. But Science. To give power to the powerless, he desires to make ways for those without familiars or powerful spirits to become a threat to those with powerful spirits. To even one day slay the gods.
Wraith
Name Arakune
Personality Almost similar to Louis own, to the point that sometimes it is confusing when it's Louis or Arakune speaking.
Gender Presumably male, since that's what Arakune refereed to himself as.
Appearance
Spiritualism
Arakune can manifest into the physical world through Louis, and being an amorphous blob, is more of a threat in a fight then one might think. However, it prefers to be sneaky rather then being brutish, not to say it won't play up it's own appearance for intimidation if the situation warrants it.
Ability Currently, Arakune is able to become invisible, and it only works on mortal and warlocks. Familiar will see him just fine. Another ability of his is to be able to understand the contents of any written language he comes into contact with without even having to open the book or look at the pages. This knowledge is shared with Lucy, but only when he is asleep.
Miscellaneous Louis and Arakune fight independently, meaning that they hardly ever are in sync with each other in the heat of battle. It doesn't help that Arakune likes to disappear in the middle of battle and Lucy's weapon of choice are explosives. They are also currently working on various projects to improve the lives of the people, from discovering alternate forms of energy to creating new medicines. Arakune does his own projects too, mostly manufacturing.