he took the opportunity

"so where would you put this chip?"

"Directly here!" as she pointed to the center of her forehead.

in that instant, midoriya used his quirk to go right infront of Mei, an inserting the chip there.

"that....was....unexpected...." Mei said.

she then went into an interesting state, her arms fell to her side, mouth open, eyes blank, standing straight.

"Mei-Bot activated, please speak to register master." she said it like a robot.

"M-mei?" he said concerned.

the chip then sank under the skin

"Master Registered as Izuku Midoriya, yes master?"