Hokuto and Izzy have gone back on a mission near the southern border. At the same time, Zephyr returned to the Ace force headquarters to give the Hakim monthly reports after giving Niken energy transfusions.
Zephyr had also spoken to Kazuto about Ren's death, and he did not hold the black knight accountable because he failed to protect the kid. He didn't blame Kazuto at all because he was guilty of this himself.
If he cared about Ren and was worried about his life being, Zephyr should have taken the young man out of the clan and made him his disciple.
But he didn't because he was busy searching for the criminal who escaped thirty years ago.
This criminal was a hazardous person and could absorb and imitate all kinds of magic techniques in just one glance. This fellow also couldn't die no matter how many times his opponent stabbed him in the heart.
