Gio

ギオ

Gio is a dragon from the ISDA who is designated as Kazuki Tachibana's "partner" following Kazuki's successful resonance with Gio's dragon egg form. Nevertheless, despite this partnership, Gio does not follow Kazuki's commands, displaying greater concern for Toa, whom he claims he was born to protect. He is highly skilled in swordsmanship while in his Communicator form.
His name originates from his code number, "G10," which Kazuki misread as "Gio."