▁Files ▁story ▁" Per cy ▁Jackson ▁and ▁the ▁S word ▁of ▁H ades ," ▁when ▁Per cy ▁drag s ▁him ▁into ▁the ▁River ▁Let he , ▁er asing ▁his ▁memory . ▁R ather ▁than ▁kill ▁him , ▁Per cy ▁ren ames ▁him ▁" Bob " ▁and ▁sends ▁him ▁to ▁work ▁for ▁H ades . ▁In ▁The ▁House ▁of ▁H ades , ▁he ▁helps ▁Per cy ▁and ▁An nab eth ▁escape ▁T art arus ▁because ▁of ▁N ico ▁di ▁Ang elo ' s ▁kind ▁description ▁of ▁Per cy . ▁An nab eth ▁is ▁afraid ▁that ▁he ▁will ▁reg ain ▁his ▁mem ories ▁by ▁meeting ▁with ▁his ▁fellow ▁Tit ans , ▁but ▁I ap et us ▁continues ▁to ▁help ▁them ▁and ▁later ▁sacrific es ▁himself ▁to ▁f end ▁off ▁T art arus ▁while ▁they ▁use ▁the ▁Do ors ▁of ▁Death . ▁In ▁the ▁outside ▁world , ▁Per cy ▁ful fill s ▁I ap et us ' ▁final ▁wish ▁by ▁looking ▁at ▁the ▁stars ▁and ▁saying ▁" hello " ▁for ▁the ▁T itan . ▁Bob ▁be fri ends ▁a ▁small ▁sab re ▁cat ▁while ▁in ▁T art arus , ▁as ▁well ▁as ▁the ▁giant ▁Dam as en . ▁ ▁Ko ios ▁– ▁Lord ▁of ▁the ▁North . ▁In ▁The ▁House ▁of ▁H ades , ▁Ko ios ▁is ▁briefly ▁seen ▁in ▁T art arus . ▁He ▁mentions ▁that ▁his ▁daughter ▁Let o ▁had ▁been ▁mist re ated ▁by ▁Ze us ▁after ▁" she ▁bore ▁him ▁those ▁fine ▁tw ins " ▁( a ▁reference ▁to ▁Apol lo ▁and