Curse of the X.

The "Curse of the X." is a mystery surrounding those with the initial "X." in their name.

The Mystery of the X.
Those born with the "X." are said to be very dangerous and ruthless, having a natural affinity towards fighting and bloodshed. While this may not be accurate for every carrier of the "X.", it is usually the case. They have a blood-lust deep within them that manifests through an aura felt by those around them. Those that carry the "X." are called monsters by the higher ups of the World Government.

The "X." stands for the letter X in the word "Xio", which means "war" or "battle".