https://www.reuters.com/article/us-retail-trading-gamestop-classaction/roaring-kitty-massmutual-hit-with-lawsuit-ahead-of-gamestop-hearing-idUSKBN2AH2LQ >The social media persona "Roaring Kitty", who became a key player in last month's frenzied rally in shares of GameStop Corp, is facing a lawsuit alleging he violated securities laws and caused "huge losses" for investors, just a day before he is set to testify before U.S. lawmakers.