The Holy Grail of Eris (Season 1)

The Holy Grail of Eris (エリスの聖杯, 2026) is a Japanese fantasy anime you can watch online on iFILM, centered on a viscount's honest but unremarkable daughter, Constance Grail, publicly branded a thief at a ball she never stole from.

Her rescuer is a ghost — Scarlett Castiel, a noblewoman executed for a crime she didn't commit, who takes over Constance's body mid-scandal and tears the accusers apart in front of the whole room. The catch: Scarlett isn't doing this out of kindness. She wants a favor paid back, and revenge is clearly still on her mind. Kana Ichinose, Sayumi Suzushiro and Jun Fukuyama voice the leads.

It's the body-swap-for-a-debt setup pushed further than most isekai bother to — two women sharing one body, and neither one's motive is clean. Stream The Holy Grail of Eris online on iFILM.