Gion is a Vice Admiral within the ranks of the Navy. She definitely has Admiral level potential, given that she was one of the candidates for attaining this position during the timeskip.

More than a year on, Maritime SDF Vice Adm. Kondo, 59, remains the only female SDF officer holding any of the top ranks--admiral and vice admiral at the MSDF, and general and lieutenant general ...

Vice Admiral Jerry Kyd was educated at The King’s School ... Across a 37-year career, his commands at various ranks have included the Type 23 frigate HMS MONMOUTH, the strike carrier HMS ARK ROYAL, ...