fer . ▁After ▁the ▁character ' s ▁introduction ▁in ▁the ▁second ▁book ▁in ▁the ▁series ▁as ▁a ▁supporting ▁ant agon ist , ▁Col fer ▁again ▁used ▁Kob oi ▁as ▁the ▁main ▁ant agon ist ▁of ▁the ▁fourth , ▁sixth , ▁and ▁e ighth ▁books ▁in ▁the ▁series , ▁giving ▁her ▁the ▁status ▁of ▁ar chen emy ▁to ▁Ar tem is ▁F ow l ▁II . ▁ ▁Introduction ▁Col fer ▁first ▁brought ▁the ▁Op al ▁Kob oi ▁character ▁into ▁the ▁Ar tem is ▁F ow l ▁series ▁through ▁the ▁May ▁ 2 0 0 2 ▁publication ▁of ▁Ar tem is ▁F ow l ▁and ▁the ▁Ar ctic ▁Inc ident . ▁Kob oi ▁was ▁written ▁in ▁this ▁second ▁book ▁of ▁the ▁series ▁as ▁an ▁evil ▁genius ▁responsible ▁for ▁the ▁highest ▁level ▁of ▁planning ▁and ▁execution ▁of ▁a ▁war ▁by ▁g ob l ins ▁using ▁out la wed ▁le th al ▁las ers ▁against ▁the ▁Lower ▁Element s ▁Police ▁Re con na issance ▁( LE Pre con ) ▁police ▁squad , ▁shut ting ▁off ▁all ▁the ▁LE P ' s ▁power ▁and ▁bl aming ▁her ▁only ▁scientific ▁rival ▁Fo aly ▁for ▁the ▁entire ▁affair . ▁She ▁emp lo ys ▁Lieutenant ▁B ri ar ▁C ud geon , ▁a ▁LE Pre con ▁officer ▁who ▁was ▁dis g rac ed ▁in ▁the ▁pre quel , ▁as ▁her ▁partner ▁in ▁her ▁attempt ▁to ▁stage ▁this ▁coup ▁deep ▁in ▁the ▁bow els ▁of ▁the ▁Earth . ▁However , ▁at ▁the ▁clim ax ▁of ▁the ▁book , ▁Ar tem is ▁reve