"I... see..."

There's a lot to think about here, as Equius tackles explaining this like he's solving a math problem, and Midoriya presses his mouth into a tight, apprehensive line. Equius stealing techniques from ancient Sleepers who by all rights should be his enemies is off-putting, potentially troubling, but not... inherently bad.

In fact, unlike him, Midoriya sees the purpose in power-suppressing manacles right away. The power negation he encountered in this world reminds him of Aizawa's Quirk. As ever, Midoriya sees Quirks as tools, to be used for good or ill. If such a thing worked, a hero might even use those to restrain a villain--though the profession of heroes and how they respond to villains doesn't exist here, no matter how much Midoriya might call himself by the title still.

Midoriya can't quite put his finger on what unsettles him, and he knows he's drawing on his own limited experience of things from home and here, but someone speaking so casually about the Zealots has something to do with it.

"That's not its purpose, no," he agreed. "I've encountered Quirk--uh, power suppression a few times here in this world. Are you saying that entire areas warded against powers is also due to blood magic using warmblood?"

He's aware that Equius comes from a combat-oriented planet. (One with a society that culls those not born within accepted parameters.) Those muscles aren't just for show. They represent the kind of strength trolls admire.

With a direct attack like that, Midoriya is ready to suddenly step back with one foot, reducing his hit area. He deflects most of the force by dodging and grabbing Equius's arm with his hands. It's powerful, enough to make the muscles of his stomach brace in reflex at the speed with which they were almost hit, but nothing One For All can't handle. When they last sparred, he was lifting steel beams. He's three times as strong and fast now.

He bends Equius's arm behind him in a hold.

"Try to get out of this," he suggests.

When Equius squirms (it's squirming), Midoriya holds fast. There's no point in all this unless he gives it his best effort. He only lets go when bidden, immediately raising his own hands. He passes a sweeping glance over him to make sure nothing is out of sorts, but the hold was designed to just hold, not cause pain.

"Since this is a new way of moving for you, we'll keep practicing until you're used to it. Wouldn't want you to hurt yourself. I had to figure this out too, but in the opposite way, since my Quirk appeared late and I never thought I'd have super strength," he rambles helpfully.