Saisho Atsushi's early life underwent significant changes when his brother became a favored head priest. Growing up in a family with strong religious ties, Atsushi was initially overshadowed by his brother's prominence and the expectations placed upon him. His brother's position brought both prestige and pressure to the family, influencing Atsushi's path and shaping his identity.

As his brother gained favor and recognition, Atsushi likely experienced a shift in family dynamics. The focus on his brother's role might have led to increased expectations for Atsushi to follow a similar path or to support the family's religious endeavors. This environment could have fostered a sense of competition or a desire for Atsushi to carve out his own niche, either within the religious sphere or in a different field altogether.

Furthermore, the family's elevated status due to his brother's position might have opened new opportunities for Atsushi, such as access to better education or social connections. However, it could also have imposed limitations, as he navigated the expectations and responsibilities that came with being part of a prominent religious family.

Overall, his brother's success likely played a pivotal role in shaping Atsushi's early experiences, influencing his personal development and the choices he made as he grew up.