Sitting wide awake in the shade of a tree, Emiya Kiritsugu watched as the angle of his shadow slowly changed with the blazing sunlight.

More than 40 hours had elapsed since he last slept, but his senses were still tense, never desiring rest.

Because he was in a dangerous situation, he had to time his breaks well and maintain a condition at which he could deal with things perfectly in crucial times – this was his experience as a professional fighter. Because the forewarning boundary field was already in place in key positions, when someone approached him he could instantly wake up. If he was in standby mode now, he could enter REM sleep within a few seconds, possibly dealing with his accumulated fatigue as well.

However, at this moment, Kiritsugu did not even spare a thought about such established caution. To cut off his feelings and maintain his very best condition was also one of his “mechanisms”, but under the state of being prepared to be scorched, he was able to surpass his limits and overdrive himself – this was another “mechanism”. The thing able to convert himself to such operational state was none other than the premonition of “settling the score” he felt under his skin.

- Fate/Zero: Act 15, Part 2