Saber's True Name is Fergus mac Róich (フェルグス・マック・ロイ, Ferugusu makku Roi?), the aspect of him as a child. Unlike other adolescent Servants, this form is not the result of a natural summoning. Scheherazade used her Noble Phantasm in conjunction with the power of Phenex to modify Fergus' Saint Graph to revert him to a younger age. Thinking his already massive libido would be increased to even greater heights with a younger form, allowing him to wreak havoc in the women-majority Agartha, Scheherazade accidentally made him much too young to care about such issues.
Agartha: The Mythical Subterranean SocietyEdit
When the Agartha singularity manifested, Fergus disappeared from Chaldea, ending up inside the singularity. His Saint Graph was modified by Scheherazade's Phenex-enhanced Noble Phantasm and he was reverted to childhood before meeting with the group from Chaldea.
- ↑ Fate/Grand Order - Agartha: The Mythical Subterranean Society, Prologue
- ↑ Fate/Grand Order - Agartha: The Mythical Subterranean Society, Chapter 1
- ↑ Fate/Grand Order - Agartha: The Mythical Subterranean Society, Chapter 15