Arthur Boyle

is a Third Generation Fire Officer at the 8th Special Fire Brigade of Tokyo.

Appearance
Arthur is a young man of average height, with shaggy blonde hair, which he tends to style upwards into a ponytail when in serious situations, such as a fight, so his vision would be clearer, and blue eyes. Arthur first appeared wearing a dark-colored jacket, with buttons and the insignia of a Special Fire Brigade, a white shirt, a belt and dark pants. He was later given a protective outer jacket and trousers. Arthur also carries a scabbard alongside him, in which he keeps his bladeless sword. Arthur was also seen wearing a grey jumpsuit, like the rest of his team-mates, when off-duty. He refuses to wear a helmet when on missions, putting a hood on his head instead.

Personality
Arthur is confident in himself as a Third Generation, though he can be somewhat arrogant and full of himself, being disrespectful towards his senior Takehisa as soon as he met him. He has a knight-like complex, referring to the girls he meets as "princesses" and the 8th Special Fire Fighting Church as his "castle". Arthur was also said to be inexplicably popular, and is mentioned to always have a silent and mysterious facade. He also bickers often with Shinra on who are superior: knights or heroes. Arthur talks to people in a very casual manner, even if such people are of a much higher rank than him.

Abilities
Arthur is a Third Generation, who has exceeded the abilities granted to him and is able to raise the temperature of the flames he creates, therefore presenting him with the ability to control the matter of plasma. Through this process, he uses a sword-handle to create an extremely hot, sharp and concentrated blade, Excalibur, which he uses as an equivalent to plasma cutting. The substance can resist the manipulation of the Second Generation, as shown when Maki wasn't able to extinguish the blade on her first attempt, unlike with Shinra and the flames on his feet.
 * — functions as both an attack and a weapon. Excalibur allows Arthur to mold a concentrated blade of plasma, a state of matter, created by heating up flames to extreme temperatures, on the handle of a bladeless sword, giving it a blade in the process. As noted by Takehisa, the swordplay using Excalibur is equivalent to plasma cutting.

Plot
Standing outside the church, Arthur looks upon it, claiming it's going to be his castle from now on. He bumps into Shinra in the corridor, immediately picking a fight with him, which leads the two to the top of the roof where they intervene between Iris and Maki's conversation. Unsheathing Excalibur, Arthur introduces himself to the girls, causing Maki to question his choice of weapon. The ruckus caused by the two Fire Officers causes Takehisa to arrive, and Arthur disrespectfully introduces himself to his superior, commenting that knights at the round table all sit at an equal footing. Takehisa tells Arthur about the upcoming tournament and asks Maki to fight the tho Third Generations to test their abilities. While Shinra is easily taken down, Arthur manages to use plasma cutting to his advantage, however, he is also taken down by Maki's superior physical skills. In rage, Arthur insults Maki, to which she becomes enraged and uses both Arthur's sword and Shinra's flame to create a gigantic fireball. Arthur, left puzzled that he lost so badly, sits down against a wall to let the moment sink in.

Trivia

 * Arthur shares his name with Arthur Pendragon, who's weapon of choice was also called Excalibur.
 * Both King Arthur and Excalibur are inspired after a British medieval leader and his legendary sword.
 * Arthur was first seen on the cover page of Chapter 0, despite not debuting in Chapter 2.