OVA
Description
Atoko Shirogane manifests as an entity derived from Atlach-Nacha, the spider-like Great Old One of the Cthulhu Mythos. She first appeared officially in the spin-off anime "Haiyoru! Nyaruani: Remember My Love (Craft)", airing from 2010 to 2011. Later, she became part of the main light novel series starting with volume 10 in 2012.
Her presence unnerves even other extraterrestrial entities. In one recorded encounter, her behavior disturbed Nyaruko so profoundly that Nyaruko explicitly permitted Mahiro Yasaka to physically strike Atoko, a significant departure from Nyaruko's usual protectiveness. During a group camping trip, Atoko sent chocolates to Mahiro and others, which Mahiro declined to eat.
Atoko also features as a main character in the OVA "Haiyore! Nyaruko-san F". Official sources provide no specific details regarding her actions, character development, or expanded background within this OVA or other media beyond her initial introduction and these interactions.
Her presence unnerves even other extraterrestrial entities. In one recorded encounter, her behavior disturbed Nyaruko so profoundly that Nyaruko explicitly permitted Mahiro Yasaka to physically strike Atoko, a significant departure from Nyaruko's usual protectiveness. During a group camping trip, Atoko sent chocolates to Mahiro and others, which Mahiro declined to eat.
Atoko also features as a main character in the OVA "Haiyore! Nyaruko-san F". Official sources provide no specific details regarding her actions, character development, or expanded background within this OVA or other media beyond her initial introduction and these interactions.