Polygraph turns a handshake into an interrogation. So long as Makoto Tsukauchi keeps hold of someone, she knows whether the words leaving their mouth are honest, with faint green-yellow sparks crackling around her hands while she reads them.
Polygraph is Makoto Tsukauchi's Emitter Quirk, and its range extends no further than contact. It weighs the honesty of whatever a target says, flagging genuine statements and false ones alike. The power debuts in Chapter 13 of My Hero Academia: Vigilantes and in that series' Episode 7.
Skin contact is the switch. With a hand on her subject, Makoto can separate truth from lies, and greenish-yellow lightning flickers from her hands and around whoever she is touching while the Quirk runs. Precision in the questioning matters enormously, because the verdict tracks the literal words spoken. Koichi Haimawari slipped past it without meaning to when Makoto asked whether he was The Cruller, getting his vigilante alias wrong and letting a falsehood register as honest.

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Makoto Tsukauchi is the Quirk's user. A related power sits with All For One, who took a lie-detecting ability from an earlier member of the Tsukauchi family. Blended with the rest of his collection it grew past the original, sharp enough to pick out hostility and ill will buried inside what a person says.
Koichi Haimawari passed because Makoto Tsukauchi asked whether he was "The Cruller," getting his actual vigilante alias wrong. Since Koichi honestly was not the Cruller, his denial registered as true even though he was concealing his real identity.
The Polygraph Quirk belongs to Makoto Tsukauchi, who debuts with it in Chapter 13 of My Hero Academia: Vigilantes.
Polygraph activates through skin contact. By touching a subject, Makoto Tsukauchi can determine whether their spoken words are honest, with greenish-yellow lightning flickering around her hands and the person she is touching.
Polygraph only works through direct contact, meaning Makoto must physically touch someone to read whether they are telling the truth.
All For One holds a related lie-detecting power, originally taken from an earlier member of the Tsukauchi family and since strengthened enough to detect hostility and ill intent hidden within a person's words.
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View on FandomThis content is original writing by Daddy Jim Headquarters based on the My Hero Academia anime series, manga, and official materials. My Hero Academia was created by Kohei Horikoshi, published by Shueisha, and animated by Bones. All rights to My Hero Academia and its characters belong to their respective owners. Episode and chapter references are cited where applicable.
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