It’d be a lie to say that she’s not tired. But Irisviel had at least rested in bed for a little while. Kiritsugu, on the other hand, didn’t rest for one minute. It was already near noon when Kiritsugu and his assistant Hisau Maiya arrived at the castle. However, as soon as they arrived at the castle they received the summons from Fuyuki church, controlled familiars, confirmed the notice from the supervisor and such, and Kiritsugu busily dealt with all these hassles without a halt. Last night, after the battle at the warehouses, Kiritsugu and company attacked Lancer’s Master Kayneth, and even encountered Kotomine Kirei. Another fierce battle ensued. Yet, Kiritsugu didn’t even show a sliver of exhaustion, then there’s no reason for Irisviel to complain of tiredness either.

No, there were other, hidden reasons for Irisviel to sigh.

- Fate/Zero: Act 6, Part 1