Diablo Tempest is a powerful demon and one of the main characters in the anime series 'Tensei shitara Slime Datta Ken' (That Time I Got Reincarnated as a Slime). Initially summoned by Rimuru Tempest, Diablo becomes Rimuru's most loyal and devoted subordinate. Despite his elegant and calm demeanor, he possesses immense strength and magical prowess, making him one of the strongest characters in the series. Diablo is often seen as a mysterious and enigmatic figure, dedicated to serving Rimuru with unwavering loyalty and carrying out his master's wishes with precision and effectiveness.