BTW my character would have had this kind of backstory, but given the limited amount of time and limit number of words we had, it wasn't implanted and I thought of some of this stuff just now too lolz.
Dr. Fangnaer is a half-elf/half-human scientist between 17-19 years old(he wasn't suppose to be real old, early 20's at most) that could use some magic given his elf background. He just can't use a lot of magic since not many people in Lothuial knew how to use magic given a mass genocide of all elves there and he had no one to teach him how to use magic.Elves where the only people who know how to use magic in Lothuial and the humans of Lothuial saw the Elves as monsters and didn't like them using magic, which would be the reason for the mass genocide of Elves, the mass genocide would eventually end and few elves and half elves would survive most just don't know how to use magic and for them to learn magic was forbidden.
Dr. Fangnaer would had been an orphan too because of the mass genocide. His mother had been executed for being an elf and the father executed for supporting the elf's since his father was human. Fangnaer would end up with his grandfather who protected him for awhile, but his grandfather would eventually die. So he would have to raise himself since most people would see him as a monster and outcast him since he was half-elf. He would grow up to be a great scientist, but not well respected for the given reason. In the journey to see what was wrong with the mountain, most people objected to sending him for being a half elf, saying he shouldn't be trusted with the task. It was finally decided after a long dispute and he went on the journey since he was deemed the best scientist of Lothuial.
His main weapon would had been a mechanical glove that enhanced his magical abilities(it would had been kept a secret from most people, except the group he was traveling with though.) The Gloves would enhance his strength too, so instead of using magic, he could just punch someone and do a lot of damage that way.
Btw Calithil wouldn't have any genocide and elves would be more abundant here.
Ishmaia would have had elf ancestry too, if I did the elves only had magic thing, but none of this was fully implanted in the actual story, so it's fine. Most of this stuff I just thought of now tbh. An Ishmaia could mainly be human with elven in his blood or something, like not a lot, just enough to give him magical ability. I did want to do a thing with Ishmaia teaching Dr. Fangnaer about magic and enhancing his ability as the journey progressed and I think Dr. Fangnaer would had started going by Erath too, his first name, after awhile that is since saying Dr. Fangnaer gets annoying after awhile.