@ drusilla -screeches loudly- Can I have a moment to settle my ideas/brain for the name? Because holy crap that's awesome and I need to apply for him but I don't want to give you a half-thought out idea. xD
My Idea
So my first thought is a dude that would fit in with my pets Cadaver and Anatomy. The undead are just a normal thing in their universe, and Donor would have been an organ donor before his untimely death. After he rose up as a zombie (sans a good chunk of his internal organs), he started work at (or founded) a Donation Center: where organs that don't meet living patient standards can still be donated, but to the zombies and other beings that could utilize them for nutrients.
(I can't get this image out of my head of the GY Torrey fumbling an armful of organs like in this meme).
I will definitely try to think of something for this guy! Do you have a deadline?
eee I didn't think anyone would really want him, but I really really love idea so I'm sorry but I'm gonna give him to them :( sorry!

-loud screeching- Thank you so much!
Friend! I didn't even know you had posted here. If I ever decide to adopt Donor out in the future, you'll be the first person I contact. ❤️