Famitsu revealed two more servants in Fate/EXTELLA: The Umbral Star, one of which is new to the Fate series.
Archimedes is a renowned genius in human history, and while he doesn’t fight in the Holy Grail War, he is entrusted with the protection of the Seraph. His Noble Phantasm is called Katoptron Katopregon.
A member of Tamamo no Mae’s party.
Here’s the magazine screen:
Fate/EXTELLA: The Umbral Star is scheduled for release on PlayStation 4 and PS Vita in Japan on November 10th, with a North American and European release later this winter.