Also known as: エシル・ラディール
A supporting character from the South Korean multimedia franchise Solo Leveling. She's a demon noble and princess of the Radiru clan. Esil was voluntold by Sung Jin-Woo to be his guide through a demon castle of a hundred levels, and helped him (in the webtoon and anime, not the original light novel) defeat the demon king Baran on the 100th level of said castle.