In The Eminence in Shadow, Cid Kagenou's alter ego, Shadow, stands out as the series' most powerful character. However, while this may be true, many of his allies and enemies can lay claim to being worthy competitors. For example, the Seven Shadows, Cid's reliable subordinates, are all highly capable fighters, each possessing their own unique strengths.
Source:https://www.cbr.com/the-10-strongest-characters-in-the-eminence-in-shadow-after-cid/