Aerial Fortress, training ground.
Hyuga Kagami, controlling the Fire Clone Technique, rapidly formed hand seals with her nimble, delicate hands and shouted, "Seal!"
In an instant, inky sealing formulas gathered from all over her body toward her forehead, eventually converging into a pale purple diamond-shaped mark between her brows.
Without a doubt, this was the distinctive mark of the Yin Seal.
"Ha..."
After letting out a soft breath, Hyuga Kagami's lips curved upward.
The Yin Seal she was using was not the gender-neutral version she had developed, but the female-specific Yin Seal version Tsunade had recently improved.
Perhaps due to the enormous pressure from the Akatsuki, Tsunade had not been idle these past years. Aside from guiding disciples such as Shizune, Hyuga Rin, and Uchiha Izumi, she had constantly been refining the various medical ninjutsu and forbidden techniques she excelled at.
The highly promising Yin Seal naturally became a major focus of her improvements.
Moreover, with her exceptional medical ninjutsu and attainments in the human body's meridians, structure, chakra control, and other fields—likely surpassing even the Yin Seal's original creator—the Yin Seal had undergone tremendous changes in her hands over the years.
Since Hyuga Kagami was the Hokage, he could freely access every improved version Tsunade had officially recorded. He therefore knew very well that, if limited to female practitioners, Tsunade's latest female-specific Yin Seal had already surpassed the gender-neutral version he had improved in terms of performance.
And since the Fire Clone Technique possessed a female body, Hyuga Kagami simply chose Tsunade's version.
Walking up to a mirror specially placed beside the training ground, Hyuga Kagami carefully examined the pale purple mark on her forehead.
Because it stored her own chakra, there was no rejection whatsoever. Thus, even a Yin Seal that had not yet been filled with chakra