Youko Aoba leads Osaka's Youth Service Group, a community organization founded on social welfare and aiding those disadvantaged by the recent war. She offers refuge to Yamamoto Akuji after his expulsion, demonstrating her compassionate approach. Her appearance features blue hair, purple eyes, and a signature outfit of a white long-sleeved dress with white pants. She commands a capable combat unit utilizing modified bows that launch spherical projectiles instead of arrows, incapacitating targets through impact. While fundamentally aligned with social welfare ideals, her group's operational methods shift drastically after Akuji assumes leadership. Under his direction, the organization expands into illicit activities like prostitution and protection rackets to fund operations, a strategic pivot deemed necessary for resource acquisition. Youko maintains a pragmatic stance towards Akuji's leadership, permitting his aggressive expansion despite personal reservations about its severity, justified by the effectiveness of his results in consolidating power. She exhibits organizational competence and a cautious disposition, balancing her initial noble intentions against the realities of Osaka's transformed matriarchal power structure. She supports Akuji's objective to challenge the region's systemic female dominance, recognizing that widespread change requires territorial control. This collaboration creates ongoing tension between her principled origins and the group's increasingly ruthless activities. She retains administrative oversight throughout the power consolidation, facilitating operations while navigating the ideological conflicts born of necessary but morally ambiguous tactics in pursuit of systemic reform.