Outburst

Outburst is the Quirk used by Emi Fukukado.

Description
Outburst has never been seen being used in action, but its functions have been described by Izuku Midoriya. According to him, this Quirk allows the user to force others around them to burst into laughter so intense that it dulls their motor skills and cognitive abilities. It is useful for incapacitating villains. The full extent of this Quirk's power, as well as its limitations, are currently unknown.

When activated, a blue aura appears around Ms. Joke. It is unclear whether or not Ms. Joke must say anything to make people laugh, or if the laughter is purely spontaneous.

Trivia

 * This Quirk is very similar to Smile, the Quirk used by the Villain Mr. Smiley.
 * Outburst's abilities are highly similar to the Joker Venom from DC Comics, with both having the ability to induce laughter.