After the run, she avoids the recording studio. Instead, she heads to an abandoned warehouse on the outskirts of the city—what she calls "The Forge."
Here, Yuna performs the exercise she invented: The Slam Scream.
The result is a terrifyingly aggressive, pitch-perfect roar that rattles the windows. She repeats this for 1,000 reps, divided into sets of 50. By rep 800, her hands bleed. By rep 950, she’s seeing stars. But she doesn’t stop. Afterglow doesn’t have a backup vocalist. Extreme Training Yuna Mitake
Extreme training isn’t all physical. Yuna admits her weakest trait is her mental volatility—she gets angry too fast, and anger disrupts vocal control.
Her solution: The Stillness Trial.
Once a week, she sits cross-legged in a completely dark, soundproofed closet. No music. No phone. No movement. For four hours.
The first hour is torture—her mind races with insults and regrets. By the third hour, something cracks. She enters a flow state where only the rhythm of her heartbeat exists. When she finally opens her mouth to sing a single, quiet A note, it’s the most pure and controlled sound she’s ever made. After the run, she avoids the recording studio
Yuna Mitake stood alone in the echoing gym, the only light a single overhead lamp that traced dust motes as they drifted through the air. At twenty-six she had already earned a reputation in underground mixed-discipline combat circles: deliberate, relentless, and impossible to surprise. But reputation wasn’t enough. She wanted to push past limits the rest of the city believed fixed.
Obviously, the average person should never attempt Extreme Training Yuna Mitake style. However, there are transferable principles: The result is a terrifyingly aggressive, pitch-perfect roar