A former member of the Kannagi household. He was banished from the family by his father and changed his name to Kazuma Yagami after being defeated by Ayano during the successor ceremony for "Enraiha", his family's sacred sword, due to his inability to use Enjutsu. Four years later, he returns to Japan as a skilled master of Fūjutsu.
Anti-Hero: Especially in the novels. He is very violent and tends to kill most of the antagonists (and severely injure many others along the way).
Blow You Away: He couldn't master Fire Magic, so he mastered Wind Magic instead. He has a pact/contract with the spirit king of air, so he has a few more feats and tricks up his sleeve than other Wind Mages.
Bodyguard Crush: Ayano's father uses the excuse of hiring Kazuma as Ayano's bodyguard to keep the two together in hopes of pairing them off, but Kazuma is actually smart enough to realize.
Parental Abandonment: A subversion. He was disinherited and cast away by his parents, but that was to make him able pave a way for himself and succeed at life. Had he stayed a Kunnagi, he wouldn't have been in a very good position at all.
Pet the Dog: He visits his father at the hospital and tells him to take care of himself.
Super-Powered Evil Side: Subverted. If Ayano is correct in her analysis, he's actually Less powerful in this state; a claim backed up by his attacks lacking their usual precision, has a lot more trouble with opponents he had previously Curb-Stomped, and an inability to access his full powers. Played straight in that he's basically a loose cannon and a danger to everyone around him like this.
Heroic BSOD: In the novels, after her friends shrink back from her in terror when she first demonstrates her power in front of them. She then gets enveloped by a puny slime monster that shouldn't have had a chance, and Kazuma has to bail her out and restore her confidence.
Hime Cut: Signifying her status as the successor of the Kannagi family.
Hold the Line: In the first arc's Big Bad boss fight, she has to keep him back while Kazuma charges up for an attack. He lets her get knocked around a little before releasing it, of course.
Ren and Kazuma's strict father. Though he is responsible for banishing Kazuma from the Kannagi family, he only wanted his son to find his own path in life.Though Kazuma defeats him in their first battle in years, Genma is the strongest En-Jutsushi of the Kannagi's, and wields the blue Divine Flame, Sōen, which only eleven others have wielded since the founding of the clan.
Older daughter of the Tsuwabuki family, who are skilled "Chijutsushi", however she was born without the ability to control earth magic. During her father's absence due to "illness", she becomes the head of the Tsuwabuki family. Like Kazuma, she was ostracized for her lack of power by her family.
Younger daughter of the Tsuwabuki family. She was supposed to be sacrificed in Taisai, the ritual of taming the behemoth within Mt. Fuji every 30 years preventing the volcano from erupting, but decided to make a clone in order to replace her.
A mysterious girl Ren meets in the park in the middle of the night and he immediately falls for her. Later she is revealed to be the clone of Mayumi Tsuwabuki created in order to replace Mayumi in the sacrifice ritual. Using the treasure of the Pixies, which is an egg that will hatch into the tribal leader of the Pixies, Ayumi's growth is accelerated, so that within one month, she grew twelve years.
One of Ayano's best friends and classmates. Yukari, along with Nanase, often teases Ayano about her apparent crush on Kazuma. She is well-connected to the information network of the student body and often knows what is happening around the school.
A member of the secondary part of the Kannagi family. Her brother was the only person kind to her, but was killed by Ryuuya when he, alongside another Kannagi relative, were on a mission for capturing Kazuma. That's the reason why she believes Kazuma was the responsible for his death. After Ryuuya's defeat, she makes killing Kazuma her goal.
The Atoner: After Michael Harley is finally destroyed she asks Kazuma to leave her to die, but Kazuma convinces her to atone for her sins by living on. She´s currently trying to pay her sins as a nun in some abbey near by Tokyo.
My God, What Have I Done?: After attempting to kill Kazuma twice, with no success, Michael Harley takes his chance and seduces her with the false promise of granting her enough power to get her revenge. She gathers inside her body the souls of many innocent victims, and even kills her own family in order to obtain that power. Michael Harley tells that their deaths were not a sin if the goal she was seeking was honorable, but when she finally confronts Kazuma and loses her battle, she realizes that those were nothing but lies and faints in horror.
A mischievous fairy who played scared people at Ayano's school, causing everyone at the school to think that a ghost was haunting the place. Tiana later approaches Kazuma about a treasure that was stolen from the king of the fairies, and hires him to retrieve it.
A young boy from the Stars of Sagacity, an organization related to Kazuma's past and Tsui-Ling's death. He uses Misao's anger at Kazuma and promised to grant her wishes. In truth, he only uses her as a medium, in order to obtain enough yoki, or life energy, to kill Kazuma.