Ascalaphus (Fate) Wiki

An Alter Ego-class servant in Fate/Grand Order introduced in the Haru no Owari ni Kimi o Matsu event. He was the custodian of Hades' orchard in the underworld, and testified that Persephone had eaten the underworld's pomegranate seeds, resulting in her having to return as his bride for part of the year. In response, Demeter cursed him by transforming him into an owl.

His third ascension, known as Ascalaphus Acheron, is locked until players complete the event.