Hiraga, Saito

平賀才人

Saito Hiraga, the primary male protagonist, hails from Earth, specifically Tokyo, Japan. At the moment of his summoning, he had just retrieved his laptop after attempting to have it repaired in Akihabara. A portal of some sort opened before him; driven by curiosity, Saito touched it and was pulled through. Initially, he was completely disoriented and had no idea where he was. Upon arriving on the other side, however, he was forced to sit and obey like a typical household dog. When the bond establishing him as her familiar required a kiss, he was quite shocked by the reason for this act. In the anime, he initially could not identify or understand the language the students were speaking, but after Louise attempted to cast a silence spell on him that failed, he could understand and communicate with others as though they were speaking Japanese. It remains unclear whether he was actually gifted with full knowledge of their language, or whether the misfired spell functioned similarly to a universal translator. This was not the case in the light novel, however, where he does understand their language; like the character names, the language spoken by them is also French.
Runes are inscribed into Saito's hand as a result of his binding to Louise. They read geboundolf or Gundolf, meaning Gandálfr (Gandāruvu?). These runes glow when his Gandálfr powers activate. As a Gandálfr, Saito possesses the ability to use any object made with the intent of being a weapon at an extremely high level of skill. He also becomes significantly stronger, faster, and tougher. Even weapons he had never touched before, such as an M-72 rocket launcher and a World War II Zero Fighter, can be instantly understood and utilized. This physical augmentation fades more or less instantly when he stops using the power, which can result in him falling unconscious if he had been wounded previously. The fact that he can only use items specifically crafted for the purpose of weapons was revealed by Derflinger after a failed attempt to use an ornamental sword. It has not been made clear whether Gandálfr powers could be used in conjunction with purely magical weaponry such as a wand or a staff. Despite these abilities, he does not defend himself at all against Louise's constant beatings.
The series constantly implies that he is a pervert, and sometimes he thinks exactly like one, but justifiably, he is a young single man who is not married to anyone. Louise simply enforces an ownership-type arrangement over Saito, implying that she is owed his feelings. It is later revealed that Saito has feelings for Louise and even states this openly to her.
Saito also has a somewhat troublesome and complicated tendency to get involved with women. Strange and oddly sexual things occur when he seemingly becomes intimate with another girl. A few examples include when Kirche or even Siesta try to gain his attention, mostly through sexual seduction. When he meets or speaks to an attractive girl, he is often only noticing her chest in a few instances. This is actually one of the main reasons why Louise treats him so poorly, as he is expected to be perfect in every way in her childish mindset.
Although he acts a bit perverted at times, this does not mean that he does not think of Louise. Similar to how she feels whenever he is becoming intimate with another girl (specifically one with large breasts), Saito can get very upset when it comes to Louise and other men. He dislikes Julio for his "snobbish" interest in Louise, especially since Julio is adored by all the other young girls at Tristain Academy. He becomes extremely jealous and calls him a bastard whenever he tries to touch Louise or gain her attention. He also becomes upset upon hearing of Louise being married off to someone else. When his friends dragged him into a hole to peep at the girls while they were bathing, he was extremely protective of Louise and stopped them before they saw her naked. He uses the name "My Louise" several times in the light novels when he feels jealous toward other guys. This is definite evidence of his strong feelings for Louise.
His partner, the talking sword Derflinger, was also the partner of the Gandálfr from six-thousand years ago. His advice and comments never reflect well on Saito. Saito protects Louise because he is her familiar, and it is later shown that he has feelings for her as well, claiming "All that he is good at is protecting her." He is revealed to be a Gandálfr, a familiar who exists to protect a Void Wizard as they cast their spells. Even when this fact becomes known to Louise, she still physically assaults him, while Saito is seen often shrugging it off as his fault. Saito was given the nickname "Our Sword" by the head cook in episode three, where Louise takes Saito into town to purchase a weapon for him, which happens to be the legendary sword Derflinger. By the beginning of the third series, the magical runes on Saito's hand mysteriously disappear, and Saito's position as a Gandálfr is in question. He regains them when he is re-summoned by Louise. With the return of the runes, Saito is knighted for the feat of stopping an entire army by himself, and given a hero's welcome at the Academy. Saito is named after Gennai Hiraga, an Edo period Japanese scientist, and his name is written as "ability man."

Spoiler

Details:

First name:: Saito
Last name:: Hiraga
Other names:: Gandálfr
Lífþrasir
Baka Inu
Our Sword
Saito Chevalier de Hiraga
Saito de Hi
Age:: 17
Birthday:: December 9th
Height:: 172 cm (5'8")