Thread:DevilSlayer123/@comment-862718-20200129113255/@comment-24595619-20200131203405

The original light novel. The anime doesn't even use all the source from the actual light novel or manga since either Reisen Hiraga (who was controlling all the stone puppets and instead used an unnamed Blazer) or Ouma who was with him. There are a lot of anime that doesn't follow the light novel.