Silver Medallion: That in which sustains their appearance through out the ages, allows them to see the dead, and call upon deaths weapons in return for sacrificing their souls to god so that he may save this world. The medallion is the ultimate weakness of the knights however most have their medallions attached to their body in unique ways to make it difficult to be removed, i,e surgically inserted into their chest etc.. they are but humans so keep in mind they can be killed.
Weapons: Members of the shield carry European style blades. Their blades hold an ability much like a shinigami's zanpuktou, but it holds no shikai or bankai, just a single ability which can be increased. Their blades do not cleanse the spirits but hoard them into a dimensional world in which they refer to as heavens hoard.
Heavens Hoard: A dimensional plain created to hold all spirits in which they defeat. Only if five medallions are broken can they be allowed back to the worlds. The leaders medallion acts as the key to releasing the heavens hoard while the other five are merely locks which bound them. The hoard drains their spiritual energy keeping the medallions strong.
Goals: To rid the world of all which is evil, thinking that spirits are evil apparitions they seek to end them