Mephisto is a guy of less to no words. He wouldn't talk most of the time and only do so if he thinks it's important. He was always dazed, and very, very observant. He preferred silence, He has weak immune system, but he won't voice it and won't take care of it unless if forced to. He has been isolating himself in his own mind. Was neglected in his childhood, making him act like so. have strong emotions actually but would contain them to himself.