In Haikyuu fandom fans may be divided due to their team and character interests. Most fans of the rival teams that appear in canon tend to group themselves in a type of niche.
School: Karasuno High (Japanese: 烏野からすの高校こうこう Karasuno Kōkō)
Mascot: This team's unofficial mascot is the crow.
- Crow symbolism sometimes leads to wingfic.
Since Karasuno is the "protagonist team," it tends to be the most well-liked. Fans don't tend to designate themselves as Karasuno fans, as it is often implied.
School: Metropolitan Nekoma High (Japanese: 都立とりつ音駒ねこま高校こうこう Toritsu Nekoma Kōkō)
Mascot: This team's unofficial mascot is the cat.
- Cat symbolism sometimes leads to catboy fanworks.
Popular pairings include Kuroken (Kuroo/Kenma) and Levyaku (Lev/Yaku). Kuroyaku (Kuroo/Yaku) and LevShiba (Lev/Shibayama) are also popular for Nekoma-only ships.
Many fans ship Kenma and/or Kuroo with characters on teams other than Nekoma, such as Bokuto (Bokuroo) or Hinata (Kenhina), respectively. Other popular cross-team Kuroo ships are KuroTsukki (Kuroo/Tsukishima Kei) and Kurodai (Kuroo/Sawamura Daichi).
Aobajohsai (aka Seijoh, Seijou, Aoba Johsai)
School: Aobajohsai High (Japanese: 青葉あおば城西じょうさい高校こうこう Aoba Jōsai Kōkō)
Mascot: There's no "official" unofficial mascot for Aobajohsai, but since the characters for "aoba" can also be read as "green leaf" (and Ushijima likens the team to "plants growing in infertile soil"), many take the mascot to be plants or ivy, though another popular interpretation is of a kingdom where the players are knights.
Seijou, despite being a narrative rival team, has a remarkable following, particularly among western fans.
Fans tend to ship Iwaizumi/Oikawa and Hanamaki/Matsukawa - the team’s second semester third-years - predominantly, sometimes cross- or poly-shipping. Another popular ship is Yahaba/Kyoutani. Kunimi also does not go ignored in Seijou ships or fans, though the same cannot always be said for Kindaichi and Watari.
School: Fukurodani Academy (Japanese: 梟谷ふくろうだに学園がくえん Fukurōdani Gakuen)
Mascot: The unofficial mascot for Fukurodani is the owl.
- Owl Symbolism sometimes leads to wingfic.
School: Shiratorizawa Academy (Japanese: 白鳥沢しらとりざわ学園がくえん Shiratorizawa Gakuen)
Mascot: The unofficial mascot for Shiratorizawa is the eagle.
- Ushijima Wakatoshi
- Tendo Satori
Dateko (aka Date Tech)
School: Date Tech High (Japanese: 伊達工業だてこうぎょう高校こうこう Datekōgyō Kōkō)
Mascot: The unofficial mascot for Dateko is a wall, which derives from their high, powerful blocks like "an iron wall."
- Aone Takanobu
- Futakuchi Kenji
- Koganegawa Kanji
School: Nohebi Academy (Japanese: 戸美のへび学園がくえん Nohebi Gakuen)
Mascot: The unofficial mascot for Nohebi is a snake.
- Suguru Daishō
- Kazuma Numai
- Naoyasu Kuguri
School: Inarizaki High (Japanese: 稲荷崎いなりざき高校こうこう Inarizaki Kōkō)
Mascot: The unofficial mascot for Inarizaki is a fox.
- Atsumu Miya
- Osamu Miya
Haikyuu Girls Teams
The Karasuno High also has a girls volleyball team which is seen in minor role in canon. In 2015, a trend began in which fantartists would create OC character designs to imagine the equivalents to the volleyball teams of each school. The trend was begun by 8oo with the Nekoma girls team in early March. 8oo's post gained over 400 notes.
slimyhipster (shounenkings), a popular Seijou fanartist, followed with with the Seijou girls team on April 24, 2015. The original post gained over 8,000 notes and further art of the OCs was also well-received.
Other fanartists began creating their own teams for different schools.
- Fukurodani by gintaka/alcieart, Apr 25
- Shiratorizawa by tobioboi/inestival, Apr 27
- Yaseikawa by viria, May 2
- Tokonami by shoujostars, May 4
- Tokonami by kidworm, May 9
Fans created art for the OCs.
- Yay Captains! by blulious - art of the captains of all the known teams.
- Haikyuu teams as boybands by necheuka_2D - art of the Haikyuu teams as Kpop bands.