When the "Three Eyes" take the life of one person,
that person will become his/her Wu, an indestructible bodyguard of the "Three
Eyes".
The Wu will have a chinese word "Wu" appear on his
forehead.
When a "Three Eyes exercises the power of his/her third
eyes, he/she will have to sleep for a couple of days. This is the reason
why a "Three Eyes" needs a Wu. To protect him/her while regenerating
the third eye's power.
When the "Three Eyes" take the life of one person,
that person will become his/her Wu, an indestructible bodyguard of the "Three
Eyes".
