Isidro is a young and ambitious character in the anime series "Berserk." He is a skilled thief with dreams of becoming the world's greatest swordsman. While often seen as impulsive and mischievous, Isidro possesses a good heart and shows growth and maturity throughout the series. He joins Guts' group, bringing his youthful energy and developing sword skills to the team. His role is pivotal as he provides comic relief while also representing the potential for human growth and the pursuit of dreams amidst the chaotic and dark world of "Berserk."