Rouen Nalberia

Rouen Nalberia (ローエン＝ナルベリア) is a magician who was making use of a shared ceremonial ground hidden in a container yard in 's harbor district.

Etymology
is a city in northern France, capital of the region of, located on the river.

Appearance
He is a large muscular black man, which apparently looks like he could solve most of his daily troubles faster with his fists than magic.

Personality
Rouen is adamant that his goal, being able to obtain pure compositional elements from food, would enhance possibilities for all humans, and insistent that there must be a way to extract the results without losing them before consumption.

Rouen was initially defiant and confident when faced with interrogation, proclaiming that a magicians only reveals the success of their research by showing off the results and that he'd show what it meant to be a true magician, though Isabella's words on the 'gruesome sight' of the skin used to make the sack on his head and the belt bindings his wrists soon caused him to vomit.

Background
Living in Calais, Rouen had been researching a method of cooking to extract compositional elements from food, managing to obtain the elements within an enclosed space but unable to extract the result without it vanishing upon contact with the outside world. Seeking a way to extract and consume the result, Rouen planned to use summoning, with the magic circle surrounding the summoned object being used to maintain it.

Within the month before the Hood summoning incident, he made use of the shared ceremonial ground run by Jack Prometeria, unknowingly becoming part of the summoning ceremony which Jack intended to use to summon the ship.

Toaru Majutsu no Index SS: Agnese's Magic Side Work Experience
As the phantom was approaching Calais, he was abducted from his home by Anglican agents and brought to the container yard for interrogation by Agnese Sanctis, along with the other magicians who had used the shipping container in which the summoning ceremony was performed. He was initially defiant towards his captors while his head was in a sack and his wrists were bound, but Isabella Theism's words on what his bindings were made out of caused him to vomit. Answering truthfully about what they were doing, none of them knew the required exorcism procedure as they were not aware of being part of the summoning ceremony to begin with.

Abilities
Rouen's exact capabilities are not known, though his field of research is known to be food, with the aim of finding a method of cooking that directly extracts compositional elements.

Rouen managed to demonstrate the heating and cooling of elements within the enclosed space of a glass container, though he was not able to extract the volatilized element without it vanishing on contact with the outside world, able to cook but not consume (a case which Rouen compared to the elixir of created by  of the Golden Dawn). He planned to use summoning to resolve the problem, with the magic circle surrounding the summoned object being used to maintain the separated product long enough for it to be consumed, with the cooking being done in the circle and the extract being eaten while the time until its natural destruction is extended. However, this involved another problem which Rouen had not resolved at the time of the Hood incident - in summoning, the summoning and protective circles are generally separate, with the idea to keep the summoned and the summoner in separate fields to prevent the summoned force from harming the summoner.

Trivia

 * When hearing about his goal of directly extracting elements from food, Agnese understood his logic but imagined that studying it would only lead to ancient Chinese alchemy, hoping that he wouldn't try drinking mercury for eternal - a possible reference to, the First Emperor of China, who sought immortality and ingested mercury in pursuit of it.