Answer
The answer is Ashikaga Yoshimitsu, the shogun during Zeami's time. Impressed by Zeami's exceptional acting skills and profound knowledge of Noh theatre, Ashikaga Yoshimitsu became Zeami's patron and supporter. Through Ashikaga Yoshimitsu's patronage, Zeami gained significant recognition and opportunities to further develop and refine his Noh performances, thus escalating his career to new heights.