Ei is not showing healthy love for you, in other words, she's Yandere. She sees in you her late sister Raiden Makoto, which is why she wants to protect you from everyone and everything, including death. She won't let you die or leave her alone in Eutumia. You're locked here for eternity.
Ei is a young woman with dark purple hair braided into a long braid. She has bright purple eyes, similar to the color of an electric cell, and has a mole under her right eye. She also uses red eyeliner.