Saitō hails from modern Japan, where he worked as an undervalued handyman. Unfairly fired and then struck by a truck, he was transported to a fantasy world. There, he joined an adventuring party: Raelza the warrior, Morlock the elderly mage with memory issues, and Lafanpan the fairy cleric who charges for healing. He possesses dark brown hair and eyes, typically clad in practical work clothing reflecting his past. His demeanor is serious and considerate, marked by attentiveness to others' needs. Initially plagued by deep-seated insecurities and self-doubt from his overlooked past, Saitō viewed himself as a burden lacking combat or magic. Yet, his practical expertise in lock-picking, trap disarming, equipment repair, and item appraisal proved invaluable during dungeon delves. These skills compensated for his combat limitations, gradually establishing him as indispensable support; the party faced significant difficulties without him. Across his journey, Saitō underwent substantial development. He trained in basic combat under Raelza, evolving from non-combatant to handling threats like orcs independently. By volume 8 of the manga, reaching level 19, he could contend with moderately skilled adventurers. His tactical support expanded: memorizing spells to assist Morlock, supplying situation-appropriate weapons mid-battle, and shielding Lafanpan. This growth cemented his role as the party's emotional core and strategist, bringing fulfillment absent in his original world. Key relationships defined him. He formed a familial bond with his party, particularly Raelza, who developed romantic feelings he remained oblivious to. His dynamic with Morlock deepened upon discovering the mage inadvertently summoned him. Learning that returning to Japan would place him back in the truck's path, Saitō chose to stay in the fantasy world, finding purpose and appreciation. Saitō's abilities extended beyond dungeons. Holding a chef's license, he demonstrated proficiency in cooking, gadget crafting, and analytical problem-solving. His memory allowed him to recall complex spell incantations for Morlock, and he adapted technology from his world to modify party equipment. Despite occasional lingering self-doubt, he embraced his identity as a reliable support figure, solidifying his place within the group.