Michael Ballzack, often referred to by his nickname Kaiser, is a character from the anime series Inazuma Eleven GO. He is a forward for Raimon and wears the number 11 jersey. He has short blue hair that covers his left eye and black eyes, and his skin is depicted as tanned.

Kaiser is quick-tempered and easily angered, often expressing frustration with people he finds annoying, such as his teammate Matsukaze and even Coach Endou. Despite this abrasive exterior, he cares deeply for his team and is genuinely affected by events that impact them, such as when Coach Endou leaves the team, which saddens him along with the rest of the squad. Over time, he gradually becomes more tolerant of Tenma, though he still refers to him as annoying. His resolve and dedication to soccer strengthen as the series progresses, and he becomes more determined to win.

He appears throughout the main Inazuma Eleven GO storyline, including in the sequel series Chrono Stone and Galaxy, as well as the movie Kyuukyoku no Kizuna Gryphon. In Chrono Stone, he is the only Raimon member who does not play in the Ragnarok tournament. His role is that of a supporting striker who grows alongside his teammates, contributing to the team's success with his developing skills and increasing maturity.