Gio is an older man with short black hair, except for a long ponytail in the back and three strands that hang in the front. Gio has a goatee and two bunches of hair on each side of his mouth. Gio also has thick eyebrows that fringe on the edges.
As a priest he wears a hammerhead shark mask and a white hooded robe.
Gio and the other priests are summoned by Gifso for the Temple Battle Royale, and are then separated with and pitted against members of the Black Bull squad. Finral senses Gio's strength and tries to run away before he is noticed.
Gio then encounters Luck Voltia and Magna Swing, and suggests that they come at him all at once. As he apologizes for his father's game, Gio manifests a large hammer and hand. Vetto suddenly crashes through the temple's wall and the whale aura smashes Gio into the ground. Gio stands up and commends Vetto's Beast Magic for overcoming the currents and breaking through the temple, and asks why Vetto is there. Vetto replies that the Eye of the Midnight Sun is after the magic stone, like the Magic Knights, and dispatches his men. Gio admonishes them for coming unannounced and for underestimating his strength. He then swings his watery hammer, but Vetto blocks it with Rhinoceros Armor and blitzes with Cheetah Charge, knocking out the priest and Luck and Magna.
- Large Magic Power: Like the rest of his family, Gio possesses a large amount of magic power, on the level of a Senior Magic Knight, and is the Seabed Temple's strongest priest. Luck Voltia states that Gio's mana reserves are as deep as the ocean.
- Enhanced Endurance: When Vetto invades the Seabed Temple, Gio survives being crushed by his magic and continues to fight.
- Enhanced Mana Sensory: Like the rest of his family, Gio has great perceptive abilities in regards to mana.
- Gio vs. Vetto: Loss
|Gio • Kahono • Kiato|
|Holy Fist of Love • Sea Dragon's Waterball • Holy Water Assassination Bullet • Death Dealing Sea Serpent • Sea God's Hammer • Sea Dragon's Roar • Climbing Coelacanth • Aqua Javelin • Tainted Culvert Wyrm • Surging Waves • Point-Blank Sea Dragon's Roar|
|Sea Dragon's Nest • Sea Dragon's Cradle • Sea God's Shield • Valkyrie Dress|
|Current of the Fortune River • Sea Serpent Twine • Qualle Operation • Aqua Curtain • Ludic Sanctuary|
|Adrian • Fluss • Francis • Lily Aquaria • Owen • Noelle Silva • Risacca Ondell • Solid Silva|
|Lolopechka • Undine|