Garrison Tokida is Banjo Haran's 55-year-old butler and loyal assistant. He manages Banjo's luxurious mansion, maintaining the hidden underwater hangar for the Daitarn 3 robot and overseeing the Mach Patrol vehicle's readiness, providing essential technical support.

He offers Banjo tactical support during operations against the Meganoids, wielding firearms with sharpshooter-level proficiency. His combat skills include marksmanship, providing cover fire or defensive assistance during tactical field engagements, and he occasionally pilots auxiliary vehicles like combat helicopters.

Garrison's background suggests prior athletic capability. His demeanor reflects formal elegance, consistently presented in a top hat with mannerisms emphasizing propriety and discretion. He coordinates with Banjo's companions, Reika Sanjo and Beauty Tachibana, during operations and assists in caring for the orphan Topo after the child joins the household. His responsibilities encompass logistical planning for missions, including preparations for the group's expedition to Mars to confront Don Zauser and Koros.

No significant character evolution or expanded backstory occurs. His contributions remain consistently focused on operational support and household management.