A person known for his extreme mood swings, and gayness. Usually found in basements, Alysters are non-social creatures that love to play games. Such as TF2, and Overwatch. The computer is an Alysters' life source, and must be on at all times unless turned off by the Alyster. If you ever think about getting an Alyster, don't. These creatures will forever be free. If you ever see an Alyster in danger, call us never. 'Cause we don't care! All Alysters are male btw, you can figure out how they reproduce.