What the role imports
The investigator is a natural role for a corpus obsessed with evidence, traces, missing history and unreliable documents.
Strong instances
Gerta Vollenweid / I Drank What?
detective work enters Lost Eros as civic machinery
King Baggot arc
two characters investigate a cultural object whose history keeps mutating
Attention / Notice / Witness
witnessing already operates as a formal ethic
Photography
the camera supplies evidence while remaining suspect
What JQD does to it
The investigator cannot restore perfect truth because the archive itself may be fabricated. The role therefore shifts from solver to witness: gather, compare, remain suspicious.
Lexical footprint
The associated vocabulary appears in 58 of 212 archived publications, with 97 matched word-forms. Hits are leads, not verdicts.
High-concentration sources include I Drank What? · NULL⁰ 1.1: 'Guy Stole My Dog' · .EXE: 150 People I Don't Need, Described · Actual Attack Documentation: Tactics, Techniques, and Procedures · Sketches of San Lucero.