Kuuko (クー子, also known as Kūko and Cthuko) is a main character of the Haiyore! Nyaruko-san series. An ancient alien who is in love with Nyaruko. she appears to be clingy but very stoic. A female Cthughan (alien from Cthugha), She is hostile toward Mahiro and tells him to …

An anime television series by Xebec aired in Japan between April and June 2012 and a second season aired between April and June 2013. An OVA was released in 2015. Two manga adaptations have been produced.

Cthugha (also known as The Living Flame) is a fictional deity in the Cthulhu Mythos. Originally created by August Derleth, the character was first mentioned in his short story "The House on Curwen Street" (1943) but did not appear until "The Dweller in Darkness" (1944). Cthugha is one of the Great Old Ones that opposes the Elder Gods.

Kūko is a female Cthughan (alien from Cthugha). She takes the form of a slender, red-haired girl. She is in love with Nyaruko despite that her race is the archnemesis of nyarlathotepians. She transfers to Mahiro's school and takes the name Kūko …

Voiced by: Miyu Matsuki. A female Cthughan (alien from Cthugha). She takes the form of a slender, red-haired girl. She is in love with Nyaruko despite that her race is the archnemesis of Nyarlathotepians, and appears to be clingy. She is hostile toward Mahiro and threatens him to stay away from Nyaruko in the beginning of the story.

Nyarko's old friend/enemy/stalker who also comes down to Earth and the humanized version of Cthugha, the Burning One.

Nyaruko-san), also known as Nyaruko-san: Another Crawling Chaos, is a Japanese light novel series written by Manta Aisora and illustrated by Koin. It was inspired by the H. P. Lovecraft's Cthulhu mythos. The series' twelve volumes were published by Soft Bank Creative under their GA Bunko imprint between April 2009 and March 2014.

Nyaruko-san (Nyaruko: Crawling with Love or Nyaruko-san: Another Crawling Chaos, literally Crawl Up! Miss Nyaruko) is a series of light novels, manga, and anime published in Japan that incorporates elements from the Cthulhu Mythos.

Cthugha ｢ 炎神之王 ｢ クトゥグア ｣, kutugua, lit. "Lord of Flame Gods"｣ is an Ultimate skill that Velgrynd acquired from Ciel after merging Raguel with the remnants of Rimuru's Uriel.

Cthugha resembles a giant ball of fire. He is served by the Flame Creatures of Cthugha. Fthaggua, regent of the fire vampires, may be his progeny. He has at least one other known progeny, the being known as Aphoom-Zhah. Cthugha is a Great Old One, an elemental spirit of fire opposed to the Elder...