Charyb is a blue Gizoid that is built much differently than the others; he is able to fight underwater and use water-based attacks. When Charyb is in the water, he is almost invincible (taking only one point of damage per hit despite the strength of an attack). His POW moves are Immunity, Regenerate and Mighty Slash.
When Sonic and Tails' group tried to fight him, the condition of his lair made him impossible to stop. When Knuckles' and Shade's group took out Scylla, they drained the water from Charyb's lair allowing them to defeat him. He is more serious than his partner Scylla.
One of the sections of the Twilight Cage is also named Charyb; it is called Sector Charybdis (Charyb for short).
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Prefect Charyb is named after the the water beast Charybdis from Greek mythology and the son of a creature named Echidna.
Even though Nestor said that Gizoids were never named, this Gizoid was given a name.