Isalo

Isalo are like humans, except their bodies are influenced by some sort of magic. After many years, they decided to separate themselves from humans entirely. Centuries have passed since then, and most don't care for the difference. All Isalo have heterochromia, and out of respect and cultural reasons, they tend to cover one or both eyes when they are lower class. Uncovering an eye if they're not a high rank is considered rude and they'd be socially shunned and thrown to the humans. High ranks are free to leave both eyes visible. Their eyes can see a magic aura let behind when a spell is used, and most magic users have a unique aura except for Elementia. They may have been influenced by magic, but they cannot actually use it.