Galvarosso is the founder and boss of the Scladio Family. Galvarosso's bloodlines run back to the Sicilian Mafia, but the Scaldio Family he leads is far different from a regular mafia, as it extends beyond national borders, bloodlines or ideologies. Galvarosso himself had extended his roots deep into the criminal underworld and helps those mages who had been abandoned by the Mage's Association, driven out of their home country, gone bankrupt or in some other way needed assistance. With this practice, the Scaldio Family managed to gain considerable influence, making itself a force recognized as dangerous by even the Clock Tower. Due to the organization holding considerable influence and power, Galvarosso himself is a very influential person, holding many connections across not just the United States but also the world. Galvarosso's ultimate goal, as he himself has declared, is to restore the Holy Roman Empire in America.
Galvarosso's name is a topic of interest, as it is not his actual name but a pseudonym he has taken. One theory states that it is a cross between the nickname, "Barbarosso", of the Holy Roman Emperor Frederick I, and Galvarosso's own name.
Galvarosso was also known to have once boarded the Mystic Train Rail Zeppelin in order to acquire a set of Mystic Eyes of Future Sight for himself, having been noted to have completely spent an entire fortune to successfully acquire them in the auction. However despite successfully obtaining the Mystic Eyes and successfully implanting them inside himself, Galvarosso was only ever see one specific future in an endless eternal loop; his own death. After that, the Mystic Eyes stopped working.
His first wife was an amateur magus of little significance with barely any Magic Circuits. For unknown reasons, she was killed by the Clock Tower eighty years prior to the events of Fate/strange Fake, but she left her widower with a lifelong desire to “see the world from the same view she did” and use magecraft himself. While this dream drove him to obtain a great amount of power in both the mundane world and World of Magecraft, creating the Scladio Family to do so, he was never able to become a magus himself. His great-great-grandchild, Olivia, resembles her.
Galvarosso is an elderly man who, despite having long extended his life using magecraft, appears like he only has a few years left to live. He is heavyset, with short hair and a bushy mustache. In his old age, he is bedridden and dependent on a respirator and life support to live.
For most of his life, Galvarosso was a “cold-hearted leader” who terrified rival criminal organizations. As he faced his long-foreknown death, however, a much different side of him became apparent. He was always driven by what he saw as a childish dream his wife left him to use magecraft and participate in the world of magi, going as far as to create his entire organization just for that purpose. He resigned himself to his death upon realizing the organization he had created had grown far beyond his control, and that its other leaders were plotting schemes he had no desire to see fulfilled. He died peacefully, with a relieved look at his face and the arm of True Assassin on his shoulder, seeing death at its hands as a mercy.
He loved his young great-great-granddaughter Olivia dearly, and placed her life above his. In the visions he received of his death from his Mystic Eyes, he saw that the events began with his gift of a plush fox to her, and surmised that he could avert the eventuality of his death simply by not giving her the toy. He chose to do so anyways, concluding he felt he would rather die than see Olivia cry and sulk. Despite this, when she told him she would treasure his gift for as long as she lived, he told her to forget him and find something else to care for.
One of the other leaders of the Scladio Family, Bazdilot Cordelion, is chosen as one of the "True" Masters in the True and False Holy Grail Wars held in Snowfield, by Francesca. Galvarosso himself recommended Bazdilot to Francesca, as he had a particular interest in the "mud of the Grail" Francesca had and believed that Bazdilot could contain it inside himself. However, Faldeus Dioland, one of the other perpetrators behind the War, is far more worried of Bazdilot and the Scladio Family as a whole, due to their power.
Eventually, Faldeus sends his Servant, True Assassin, to assassinate Galvarosso, intending to weaken the powerful family. After multiple associates of his are all killed in a single day, it is unclear what Galvarosso's ultimate fate is. Demanding to know the truth, Faldeus interrogates his Servant, who tells him that Galvarosso's "personhood" had been eaten away. He reveals that when he confronted Galvarosso, he learned that some of the magi within the Scladio family had plotted to overwrite the souls and personalities of many influential and powerful individuals within the United States and replace them with copies of Galvarosso’s in order to quietly usurp the nation, transforming it into a “mage’s paradise”. While Bazdilot Cordelion opposed the plan, it was already in the works before True Assassin ended the lives of both Galvarosso and all the people that the Scladio Family sought to replace with copies of him. Rejecting this outcome and accepting his death, Galvarosso remembered his childish dream in his dying moments and allowed True Assassin to end his already fragile life.
Galvarosso holds a great amount of influence, both political and economic, that reaches even beyond the boundaries of the United States. He has also gained great fame in the underworld, due to his cunningness. He resides within a vast mansion which is fortified by magecraft to a degree where it does not need a single human guard. It was created by the Family’s most elite magi, and is protected by various magical traps, defenses, and evil spirits all within a thirty-five layer Bounded Field. Only the headquarters of organizations like the Clock Tower and the Wandering Sea, or the workshops of magi skilled enough to reach the Root, can surpass its defenses, and it is reinforced to defend against both airborne projectiles and attempts to destroy its foundations from underground.
Galvarosso once bought Mystic Eyes of Future Sight and implanted them on himself, but all he was able to see was his own death in a loop, forcing him to remove them. He is not a magus, despite his use of magecraft administered by others within the Scladio Family to extend his life.