Everyone knows Scarlet Witch or Wanda Maximoff, one of The Avengers. The story that you never know is Wanda has a sister. She is a hero too. But her existence was covered by the one and only Tony Stark, because Kat was too young. Now, Kat is 15, so Tony gave her first mission. This story is about Kat Maximoff, Wanda and Pietro's sister. WARNING english is not my first language, so if there's a grammatical problem or else, please tell me.