Masato Shikibu, the youngest member of the Cyber Beast Force, hails from Iwate Prefecture. Born into wealth as the son of an arms manufacturing plant president, he rejected his family's legacy and defied his father by enrolling as a sixth-team trainee at the military academy. This act of rebellion placed him within Earth's resistance during the Muge Empire's invasion.

Piloting the AGT-3 Land Liger, Masato utilized its beast mode for high-speed leaping in combat. This machine also formed the right foot of the combined super robot Dancouga. While initially inexperienced, his emotional resilience balanced his combat role, which often involved providing comic relief despite rarely receiving focused narrative episodes.

A close friendship with Laura Sullivan, an American orphan adopted by the team's scientist Professor Hazuki, served as a primary emotional anchor for Masato. This bond extended to Laura's dog, Becky.

Years after the Muge Empire's defeat, depicted in the OVA "God Bless Dancouga," Masato initially transitioned to civilian life alongside his teammates. This peace shattered when the Cyber Beast Force was imprisoned after failing to prevent a city's destruction by a Muge remnant. During these events, Masato's father was killed in an engagement involving a Muge survivor. This loss represented a significant personal tragedy, compounding his wartime trauma and forcing his return to combat.

Masato's journey across the series and OVA reflects a progression from youthful immaturity to a more hardened perspective, shaped by combat, loss, and the ethical conflict surrounding his family's arms trade. The aftermath of his father's death underscored his continued commitment to protecting Earth despite the personal costs.