- Acting for Two: Inori Minase pulls double duty as Reines and Trimmau, as does Allegra Clark in English.
- Development Gag: Faker being a female Servant who drives a chariot pulled by dragons is based on a Rider concept Nasu had for Fate/Zero that was discarded when Urobuchi came onboard.
- Role Reprise:
- Daisuke Ono, the voice of Add, previously played Sir Kay in the drama CD Garden of Avalon.
- Lucien Dodge, Khoi Dao, Tom Bauer, Kira Buckland, Patrick Seitz and Lauren Landa reprised their roles from previous Fate titles as Waver, Flat, Caules, Olga Marie, Kairi Sisigou, and Luvia. For cameos, Doug Erholtz and Jamieson Price return as Kayneth and Rider.
- You Sound Familiar: The English dub cast has a few cases of this.
- Kayli Mills (Gray) previously voiced Fiore in Fate/Apocrypha.
- Allegra Clark (Reines) previously voiced Assassin of Red, Archer of Red, and Reika Rikudou in Apocrypha as well.
- Sarah Williams (Yvette) was Berserker of Black in Apocrypha
- Julia McIlvaine (Hishiri) previously voiced Sella in Fate/stay night: Heaven's Feel: Presage Flower (though only in the theatrical version of the dub, the home video release has Rachael Lillis return from the UBW dub)
- Greg Chun (Add) voiced Twice H. Pieceman in Fate/Extra Last Encore.
Trivia / Lord El-Melloi II Case Files