Maryann

Maryann is a minor villain in the TV Series The Fairly OddParents!. She is a former godchild of Cosmo Cosma and Wanda Fairywinkle-Cosma.

According to Wanda, Maryann abused their magical powers. On the 28th July 1914, she wished that Franz Ferdinand (the Archduke of the Austro-Hungarian Empire) and his wife would be assassinated, thus plunging the world into the First and Second World Wars. It was for this reason that Cosmo and Wanda were taken away from her. It is unknown how she was able to wish that the Archduke would be killed, because in the Da Rules, it states that a godchild cannot wish someone dead. Although it is possible that this rule was created because of her.

She was once wished out of Cosmo and Wanda's Hall of Infamy in their house by Timmy after he stole Cosmo's wand. She then tried to steal Wanda's wand and would have succeded in getting her revenge, but was thwarted by Wanda, and put back into her painting where she belonged.

She is arguably one of the most evil godchildren Cosmo and Wanda ever had as she actually had Archduke Ferdinand murdered through magic and started World War I, whereas in actual history, Archduke Ferdinand was assassinated by Gavrillo Princip.