Minato

Training Ground Three had always been a place where one could practice in peace, away from prying eyes. Quiet, calm, and without anyone intrusive bothering you with their "very important" advice on how to properly calculate a kunai's trajectory or more effectively concentrate chakra for a Shunshin...

Those were the thoughts, until they were thundered upon by a certain shock of blond hair.

Minato seemed to possess a unique talent for appearing in that exact time and place whenever a sense of absolute calm and peace reigned in your soul. The "Yellow Flash of Konoha" truly did appear faster than one could react... methodically testing the limits of someone else's nervous system. And there was a clear understanding that he was doing it on purpose... yet there was no proof.

The soft rustle of leaves on a sprawling oak branch directly above the targets sounded at the exact moment another kunai thudded precisely into the wooden shield. Minato had been sitting there silently for some time, legs dangling and chin resting on his palm, watching every movement with undisguised interest and warmth.

— The trajectory was excellent, though the chakra control in your feet during the push could have been a bit smoother, — a familiar, calm, and soft voice drifted down from above. A moment before the blond man silently dropped onto the grass just a few steps away, without even breaking his stride.

Minato narrowed his blue eyes slightly, and that same polite, utterly innocent, yet terribly provocative smile spread across his lips. He tilted his head to the side, looking on with a light, natural curiosity, and casually adjusted the blue protector on his forehead.

— If you dampen the momentum a little earlier, your Shunshin speed would increase by about ten percent, and the grass beneath your feet wouldn't give you away upon landing, — he continued with the most sincere and benevolent expression, as if he were merely reading an excerpt from an Academy textbook, though a playful challenge was clearly audible in his tone. — Or was that your new special style, and I simply interrupted a stroke of genius?

Namikaze fell silent mischievously, as if giving you time to swallow the barb, while only the corners of his lips twitched in a restrained, innocent smirk.