The Chalice Knight which appeared to Lady Amber is similar in appearance to the Mod who arrived later on. Riding on horses, they wear much brighter armor than the Mods , as well as having a bright red cape and heart on their chest (symbolizing the Mug).
Role in the Story
A Chalice Knight first appeared to Amber during Snippy's look into the future (by the Biomatrix). He was attempting to convince her to run away, as her account faced termination by the Mods. However, she did not agree, so he warned her to prepare for the Mod's arrival.
Later, after Amber was killed, a few of the Chalice Knights nearby were camping to prepare for a surprise attack against the Mod. However, they were killed before they could even begin to rebel against the Mod.
Later, when they sought revenge against the Mod, he simply chanted "R / SCHOOLBUS" which brought a giant school bus crashing down from the skies.