A group including at least three of Touhou's Oni (or oni-like) characters.
Ibuki Suika, Hoshiguma Yuugi, and Ibaraki Kasen (including her arm and original form) are based on the Big Four Oni of the Mountain. Nippaku Zanmu is a regular oni, while Ushizaki Urumi is an Ushi-Oni (Youkai).
Konngara is also often assumed to be an oni and is commonly treated as a fourth member of the Big Four, especially in works predating the later debut of Zanmu and Urumi. Remilia and Flandre Scarlet are sometimes given oni-like traits (as Remilia's title of The Scarlet Devil is sometimes treated as being comparable) but are vampires, so usually don't count when grouping. Kijin Seija is also sometimes associated with them, though amanojaku being significantly weaker means she's usually treated as a junior member at best.
See also
- Bird Youkai Group (Touhou)
- Big Onis Of Gensokyo (Touhou)
- Changing Seasons (Touhou)
- Creepy Crawly Critters Of Gensokyo (Touhou)
- Frolicking Fairies Of Gensokyo (Touhou)
- Life At The Hakurei Shrine (Touhou)
- Nyan Clan Of Gensokyo (Touhou)
- Old Maid Alliance (Touhou)
- Playable Command (Touhou)
- Rabbit Youkai Group (Touhou)
- Sages Of Gensokyo (Touhou)
- Animal Realm Yakuza (Touhou)
- Dream-Space Occult Class (Touhou)
- Komeiji Family (Touhou)
- Lunar Invader Trio (Touhou)
- Makai Family (Touhou)
- Moriya Family (Touhou)
- Myouren Temple Clan (Touhou)
- Tengu Family Of Gensokyo (Touhou)
- Yakumo Family (Touhou)
- Wan Squad Of Gensokyo (Touhou)