She's also shown to be extremely egotistical both in and out of matches, often being confident in her victory. Mary also possesses a habit of mocking her opponents and laughing at them, especially when match seems to be her win. Still, she is sometimes slightly nettled by Ryota's cowardice or Yumeko's reckless behavior; but she still cares deeply about them. She also developed a huge hatred towards the student council, and wished for them to pay for what they had done to housepets.