Ronaldo is a renowned vampire hunter featured in the anime series 'Kyuuketsuki Sugu Shinu' (The Vampire Dies in No Time). Known for his bravery and skills, Ronaldo takes on the task of dealing with troublesome vampires. Despite his tough exterior, he often finds himself in humorous situations due to the antics of his vampire companion, Dralc. Ronaldo's interactions with other characters, especially Dralc, provide much of the comedic relief in the series. His role is central to the plot as he navigates various vampire-related challenges with a mix of seriousness and comedy.