Well then I don't think agent47's got a speck of a chance if he can't break world record by magnitudes of stupid. Type Moon is well known among the fantasy circle for creating broken characters after broken characters. Imagine a Marvel universe where everyone are Captain America, and your classmate is batman, your teacher is deadpool and your parents---type moon characters have noparents.

In Kirit$ugu's final fight against Kirei, Kirit$ugu swung his arm so fast, he was breaking the bones in his arm everytime he swing his knife around(and healed by Avalon immediately). That calls for some serious G-force to be applied to his arm.

The question: how much G-Force was applied to his arm when he swung his knife around? Air Force officer John Stapp once performed an experiment to find out how much G-Force a human can withstand, and he survived an impressive 46.2g without trauma.

Hmm...not enough.

Pushing the limits further, Kevin Reed performed another experiment in the NHTSA to find out how much g-force a human body can withstand without suffering trauma, and the average result: 65g. Anything beyond that and you may or may not hurt your body structure. That includes your bones and tissues. 65g means an acceleration/deceleration of 65 times the earth's gravity, which is about 9.81----so you have to go from 637.65m/s to a complete stop, or...

Go 318.825m/s in one direction, then immediately reverse at the same speed. At this speed your bones may break. Let's put an extra 0.2m/s in the end to and assume Kirit$ugu swung his arm at 320m/s in both directions.

320/19 = 16.84. Kirit$ugu can pull a punch 16.84x the world record, or 94% the speed of sound.

But hey, that's when he was reinforced with magic!

Damn right, he was using triple-accel during that fight, 320m/s is actually 300% of his speed. Let's divide that by 3 to nerf Kirit$ugu to pre-magic time-alter speed.

.........

106.67m/s. He's still 5.6x faster than world record.

Good luck agent 47.