Saito Hiraga

Age: 17

Height: 172 cm (5'8")

Birthday: December 9th

Favorite Food: Teriyaki Burgers

Hobbies: The Internet

Special Skills: Good with Action Games, Swordsmanship

Hates: His P.E. Teacher

Weapon: Delflinger (デルフリンガー), a sentient sword

Saito Hiraga, the main male character, is from Earth (specifically Tokyo, Japan). At the time of the summoning, he had just picked up his laptop after attempting to get it repaired in Akihabara. A portal of some kind opened in front of him; and Saito's curiosity getting the better of him, he touched it and was sucked through. At first, Saito had no idea where he was, and was thoroughly disoriented. When he arrives on the other side however he is made to sit and obey like a normal household dog. When the bond of him being her familiar, involves having a kiss with the familiar, he is quite shocked at why they do it. In the anime, he also could not identify nor understand the language the students were speaking, but after Louise attempts to cast a silence spell on him that fails, he could understand and communicate with others as though they were speaking Japanese. It is not clear whether he was actually gifted with full knowledge of their language, or whether the misfired spell was similar in principle to a universal translator. This was not the case in the light novel though, where he does understand their language; like the names of the characters, the language spoken by them is also French.

There are Runes inscribed into Saito's hand as a result of his being bound to Louise. They read geboundolf or Gundolf meaning Gandálfr (ガンダールヴ, Gandāruvu?). These runes glow when his Gandálfr powers activate. As a Gandálfr, Saito has the ability to use any object that was made with the intent of being used as a weapon at an extremely high level of skill. He also becomes significantly stronger, faster and tougher. Even weapons that 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'd been wounded previously. 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. Even with these abilities he doesn't defend himself at all against Louise's constant beatings.