Szilard Quates

Szilard Quates (セラード・クェーツ, Serādo Kuētsu) is one of the alchemists who obtained complete immortality aboard the Advena Avis in 1711. He devours thirteen of his fellow alchemists aboard the ship, and spends the next two hundred years advancing alchemic research in his quest to recreate the Grand Panacea. Firo Prochainezo devours him in November 1930.

Szilard is the main antagonist of The Rolling Bootlegs  and has left a blinding legacy towards the character development of several characters, chiefly Firo, Ennis, Felt Nibil and Phil. He is the creator of Ennis and her two deceased brothers; in the 2002 storyline he has a descendant named Bild Quates who bears a striking resemblance to him.

Personality
(Under revisement)

Aboard on the Advena Avis, Szilard was close-minded and denounced the idea of summoning a demon as heretical. He quickly changed his tune once he obtained immortality and sought to learn the secret of the Grand Panacea by going after Maiza Avaro (only to accidentally devour Gretto Avaro instead).

Szilard is one of the greediest characters in the series, motivated by an obessive lust for perfect knowledge and absolute loyalty. His thirst for knowledge - to know everything - is so profound that he is more than willing to kill in his quest for it.

Chronology
(Needs extensive work)

Unspecific time period
Szilard, along with Victor Talbot, is hired as as an alchemist for House Dormentaire, a powerful Spanish aristocratic family.

1711
In 1711, Szilard and Victor arrived in the now Dormentaire-controlled Lotto Valentino, under Dormentaire orders. They end up leaving the city with twenty-eight other alchemists aboard the Advena Avis, where they become complete immortals. Szilard jumps overboard after devouring thirteen of the other passengers, including Gretto Avaro.

Skills and Abilities
Physical - Szilard has enhanced his body's abilities over the years, first and foremost training himself to withstand pain. Given that he was able to stay alive despite being riddled with bullet holes in 1930, as well as quickly regenerate from being stabbed in the back, it is extremely likely that he had himself killed over and over again by various methods in order to speed him his regenerative processes.

Research and Knowledge - Szilard is a highly skilled alchemist, and over the centuries made considerable advancements to the field of homunculi research in particular. He has also accumulated vast amounts of knowledge from all the people he has devoured over the years.

Organization - Szilard established and expanded a large research network over the years, with laboratories and other hubs spread across the United States and extending into Europe. At least one research lab of his has survived into the twenty-first century, led by his descendant Bild Quates.

Trivia

 * His name, Szilard, correctly pronounced in Hungarian (his original country) is "C-lard".
 * In the anime outro, he is only ever credited as Szilard.