Yuki is the main protagonist of Maou ni Natta node, Dungeon Tsukutte Jingai Musume to Honobono suru. Being reincarnated as an "Archdemon" later evolving into a "Demon Lord". Getting reborn by the dungeon he is now tasked with being the current overseer of the dungeon. His appearance is described as being a bit taller than the average man and is the rest is the overall average. Originally both his eyes were black however after reincarnating his right eye changed to a crimson color while his left remained black.

Spoiler

Later Leficios (Lefi) becomes Yuki's first official wife and gets engaged to Nell & Lyuu