Hitoshi's Quirk allows him to mentally control people who verbally respond to him and, as a result, they will be forced to do whatever he wants. However, this Quirk will not activate if he does not will the brainwashing on the responder.
Though he can have multiple people under his brainwashing at once, he has stated that trying to brainwash multiple people simultaneously could cause him to fall unconscious. He is also unable to have his victims do things that require some kind of advanced brain function, like writing a name from their memory.
Using a megaphone or anything that makes his voice artificial will not allow his quirk to activate, which is why his Artificial Vocal Chords only modify the tone of his voice, and nothing else.
Though he can have multiple people under his brainwashing at once, he has stated that trying to brainwash multiple people simultaneously could cause him to fall unconscious. He is also unable to have his victims do things that require some kind of advanced brain function, like writing a name from their memory.
Using a megaphone or anything that makes his voice artificial will not allow his quirk to activate, which is why his Artificial Vocal Chords only modify the tone of his voice, and nothing else.
Theatre of the Actors of Response
detail
A Person Looks At A Work Of Art/
someone looks at something...
LOGOS/HA HA