Aegis Thea Eaderlindt

Aegis Thea Eaderlindt is the elven bodyguard knight who accompanies and protect Iris. At the Ark Metropolitan Academy, she helps her and the professor by keeping watch so people won't come near them, and by doing it with him whenever Iris is unavailable. She's also Iris elder sister, before she went Iris' knight, she was the first princess of her nation, but her temper made her choose a different path than the throne.