Easlies Swordfrail

Easlies Swordfrail (also referred to as Izliz Swordfrail in some translations) is a powerful necromancer from the fantasy world in Dead Mount Death Play. In the anime, she is depicted as the former second-ranked imperial court sorceress of the Byandy Empire and the previous master who taught necromancy to the Corpse God.

She appears primarily in flashback sequences and scenes tied to the otherworld's backstory (notably around episodes involving the past conflicts and characters like Shagrua Lugrid). Her distinctive appearance includes a bovine skull mask (likely from a milk cow) covering her face, along with an overhanging veil, long light-colored hair, and a pointed hat featuring two protruding horns and a chain of vertebrae dangling from the tip, giving her a very eerie, ominous look fitting her "Demon of the Peninsula" moniker from in-universe lore.

She's nicknamed the "Wandering Balcony" and is portrayed as a formidable, enigmatic figure in the necromancy field. Her role in the anime is more supporting/backstory-oriented rather than a central ongoing presence in the modern Shinjuku arcs.