Fafnir

Fafnir  (ファフニール Fafunīru) or  Takeshi Ooyama  (大山 猛  Ōyama Takeshi) is a male dragon and a supporting character. He is Takiya's roommate and friend.

Appearance
In his Human form, he appears as a long, straight haired man in butler attire. He has red eyes which can change color and size depending on his rage. He has a calm, collected demeanor which reflects his slightly gloomy face.

When he is in dragon form he appears as a towering dark dragon with 3-4 pairs of pure red eyes.

Personality
In the beginning of the series, Fafnir abhorred humans for everything they were. As the series goes by his heart warms up to a human with similar interests and takes on a sensei-student style friendship with Makoto Takiya. His hatred for humans turns into more of an indifference to them, and more of a pain to get to know them rather than just kill/ignore them.

Due to this, he became extremely addicted to video games and other Otaku interests since his life style of a cursed dragon can easily accommodate it. He is hardworking and diligent for his passions as seen with his multiple all-nighters to play games.

Powers
Curses

- He has the ability to curse and even wrote a book filled with real curses and tried to sell it at Comiket, sadly not a single copy was sold so its true worth never showed.

Relationships
Makoto Takiya - His roommate and friend, Takiya is the human who introduced Fafnir to video games. Kobayashi was surprised when he accepted Fafnir as a roommate without question. Fafnir tags along with him to conventions and helps him set up, later on setting up his own stand (with no sale-success).

Tohru - Tohru seems to be his friend and possibly a student. She often calls him early in the story to ask for his advice.

Kobayashi -

Quetzalcoatl -

Elma -

Kanna -

Trivia

 * He bears a resemblance to Sebastian Michaelis from Black Butler, due to his appearance and even his Japanese voice actor.
 * Tohru calls him Mr. Fafnir.
 * Fafnir is also the name of a dragon in Norse mythology, who is the son of the dwarf king Hreidmar.