I just got another supervillain idea: Lady LOL. Here's her bio:
Name: Lady LOL
Powers: Makes everyone laugh madly, make the craziest jokes ever.
Goal: Make Paris go mad with laughter.
Akumatized object: Jokebook.
New student, trues out for comedy audition and fails because the judges are very sarcastic and mean.
Closes her eyes A LOT while laughing.