The elf at the magic academy

In a world where nobles and kings rein over commoners, Iris is the first elf to be seen in over 100 years. The last time a elf was seen was during the war that was settled with a peace treaty. The elves then went into hiding in ancient forests and haven't been seen since. Iris was abandoned at only 4 years old by her parents in a forest nearby human territory. When she turned 7 she was found by a kind old man who educated her in the ways of humans, sword play and other arts. While being taught she found she had an amazing amount of magic power. She kept it a secret and leveled up secretly. When she turned 12 she was told to enter the magic academy for nobles. She is the first commoner to have been in the academy since over 5 decades ago. Now with not much of a personality she has to brave the challenge of being bullied while the demon king is about to rise once again.