Shiro emerges in the series' second season as one-third of a trio alongside Marduke and Mürrenbach. Visually reminiscent of a plush toy, Shiro defies conventional warrior archetypes through exceptional courage and unwavering dedication in combat scenarios. The character’s effectiveness derives from spirit and skill rather than physical stature, highlighting that machine-based combat prioritizes these attributes over size or strength. Shiro actively supports team-based operations against central threats, with the trio’s collective actions proving pivotal during critical confrontations.