Boss, the eldest among the children transported to another world, earned the role of group leader early in their journey due to his age. His leadership faces frequent challenges stemming from his struggles with decisiveness during critical moments. His tendency to propose discussions and votes for every decision is often ignored or undermined by the others, diminishing his practical authority. Despite being older, he openly shows fear in dangerous situations and lacks the physical prowess demonstrated by some boys.

He compensates for his fears through steadfast loyalty and protective instincts, willingly stepping up to defend his friends. Boss always carries personal grooming items, specifically a mirror and comb. Initially, he develops romantic feelings for Manua, a local inhabitant who aids the group. As the series progresses, his romantic interest shifts to Tiger, a tomboyish and combat-skilled girl within their group. Tiger reciprocates his feelings by the narrative's conclusion. This shift occurs amidst the group navigating conflicts involving soldiers, priests, and dinosaurs while aligning with rebels against an oppressive regime.

His role involves balancing his elected position against personal limitations and evolving relationships, contributing to the children's collective struggle for survival and a way home.