From ErfWiki

Proposed Canon

The "Knights in Stanley's Service" is a force of elite Hobgobwin warriors handpicked by Stanley the Tool.^Erf-b1-p076 These knights are known^Erf-b1-p090 for their dance fight abilities^Erf-b1-p111.

Speculation

Real World References

The Knights are an obvious homage to a well known band. The warpaint worn by the Knights copies the stage paint that KISS wear during their live shows and music videos.

The name "Knights in Stanley's Service" is based upon a common myth that KISS took their name as the acronym for the phrase "Knights in Satan's Service" - a rumor believed to be false and created by religious individuals with a hatred of rock.