Grave Dragons are not named for their connections to death or burial, but for the grave expression on their faces. This strange expression is used as a defense mechanism that causes fits of panic and terror in potential predators. Since they only eat ash and charcoal, they do not hunt. Grave Dragons are powerful fire-breathers and have been known to burn down forests and villages alike to make meals. It is believed that the markings on each Grave Dragon’s wings are the faces of those who have lost their lives in fires started by that dragon.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

One of the many enthusiastic players of "kick the ball with your hindlegs" in the clan, Rummenigge is the oldest player in the mixed Grave dragons' team. He is rather tall and a fast runner and therefore often leads attack against the opponent's "gallows" to score a "gaol". His fans have created several little hymns they sing to his honor, always climaxing in the chant of "Rummenigge, Rummenigge, our love".

Outside of his talent in the game, Rummenigge is less popular than many of his team mates though as many think he just cares about success and nothing else.