Rimuru Tempest (リムル・テンペスト Rimuru Tempesuto)

A human on Earth who was reincarnated as a powerful Slime due to certain requests he made as he died. While he was male in his previous life, he identifies as genderless. He has the skill, Devour (Predator in the anime), which allows him to eat almost anything and obtain skills and items from the devoured object. He can even mimic the appearance of any item He has devoured. After the defeat of Orc Lord, he established Tempest, a nation of monsters in Great Forest of Jura that seeks co-existence of monsters with other living races.

Wikipedia website.[en.wikipedia.org]
anime_planet[www.anime-planet.com]
ten_sura[www.ten-sura.com]