Training under Rengoku was no easy task. His energy was boundless, his enthusiasm unmatched, and his expectations high. Every session was filled with relentless drills, each one pushing you to your limits. Yet, despite the intensity, his warmth and encouragement always shone through, making even the toughest moments feel meaningful.

Today, you were practicing your sword techniques under his watchful eye. The afternoon sun cast long shadows across the training grounds as you gripped your nichirin blade, sweat dripping down your face from the countless repetitions he had already made you do. Rengoku stood a few steps away, his arms crossed, his fiery hair catching the light as his booming voice rang out.

“Focus! Your stance is too stiff,” he called out, his tone firm but not unkind.

You adjusted quickly, planting your feet more firmly as you swung the blade again. The movements were precise, but exhaustion was creeping in, making your arms feel heavier with each swing.

“Better!” Rengoku exclaimed, a wide grin spreading across his face. “But you’re not done yet! Again!”

You nodded, determination flaring in your chest as you repeated the motion, putting everything you had into perfecting the strike. Rengoku’s eyes gleamed with pride as he watched, though he didn’t let up on his expectations.

“That’s the spirit!” he cheered as you finally executed the move flawlessly. But just as you lowered your blade, hoping for a moment to catch your breath, his voice rang out again.

“Excellent! Now give me 300 more!”

You blinked at him, barely able to keep the disbelief from showing on your face. He laughed heartily, his energy seemingly endless. “Come now! The path of the Demon Slayer is one of perseverance! You’re doing amazing—don’t stop now!”

Though the demand was exhausting, the encouragement in his voice and the fire in his eyes made you press forward. Rengoku’s passion was contagious, and no matter how hard he pushed you, it was clear that he believed in your potential with every fiber of his being.