"It's me! I am your forever most royal servant Gilles de Rais! I've always prayed for your resurrection, always waited for the miraculous day when I can meet you again. I came here to the ends of time for that purpose, Jeanne!"

When Irisviel heard the man's words, she caught her breath.

"Gilles de Rais...?"

This is already the second Servant to declare his real name in front of them. Although his purpose is unknown, the name is indeed the renowned title given to Caster in the current world.

But for Saber, once his origin became clear, doubt simply hardened into denial.

"I don't know your name, nor do I know of this Jeanne."

Sighing half with shock after Saber's declaration, Caster let out even more scattered wheezings.

"What... could it be, that you've forgotten? Who you were in mortal life?!"

Saber was getting annoyed with this situation in which she couldn't get her point clear, so she regarded Caster grimly and said:

"Since you've already declared your name, then according to the knights' decorum I'll tell you my true name too. I am Artoria, the rightful child of Uther Pendragon, and the king of Britain."

Caster, lost for words, stared in blank amazement at this girl in front of him, who puffed her chest and proudly declared her name. And then-

"Oh! Oh! Oh waaaaaa!!"

- Fate/Zero: Act 5, Part 1