Galleo is a tall man with graying brown hair that his combed back, as well as a brown beard. He has a scar running from his forehead to his cheek that passes over his left eye.
Galleo's clothing is the typical uniform of the Diamond Kingdom soldiers, except he has a red belt.
Galleo is a professional and does not take betrayal well.
After Fanzell Kruger flees the Diamond Kingdom and frees his students, Galleo tracks down the escaped students. He captures Mariella but spares her life. In return, she helps track down Fanzell and Dominante Code.
Months later, Galleo leads several squads to the Black Bull base where Fanzell is hiding. Before the attack commences, he sends Mariella off to capture Domina as a hostage. During the attack, Gauche attacks Galleo while the other Black Bulls fight off the Diamond soldiers. Disguised as Fanzell, Grey sneaks up and grabs hold of Galleo. The commander reveals the plan to hold Domina hostage, and Grey reveals that her teammates were sent to protect Domina.
Galleo escapes from the Black Bulls and teleports to Kikka's black market. He overhears Mariella's plan to betray the Diamond Kingdom and decides to execute her, so he traps her in his Unopening Red Room. Fanzell and Asta get in the way and are pulled in too. Inside his spell, Galleo creates Crevice Men to attack the three. Fanzell and Asta defend Mariella and defeat Galleo.
- Communication Device: Galleo possesses a small device that allows him to communicate with other Diamond Kingdom mages. It can only transmit audio.
|Mars • Ragus • Broccos • Yagos • Ladros|
|Lotus Whomalt • Galleo|
|Fana • Fanzell Kruger • Dominante Code • Mariella|
|Myriad Black • Crevice Men • Archangel Shootdown • Archangel Destruction|
|Fallen Angel Gate • Blackout • Different Dimension Sphere • Unopening Red Room • Fallen Angel Flapping • Spatial Mana Domination|
|Abari • Ado • Cob Portaport • Finral Roulacase • Langris Vaude • Ledior Vaude • Ratri • Valtos • Vide|