▁in ▁The ▁Lost ▁Hero . ▁He ▁is ▁eight ▁years ▁old ▁at ▁the ▁time ▁of ▁The ▁H idden ▁Oracle , ▁but ▁very ▁mus cular . ▁Har ley ▁has ▁been ▁trying ▁to ▁locate ▁Leo , ▁his ▁older ▁half - bro ther , ▁with ▁a ▁mag ical ▁be acon ▁ever ▁since ▁his ▁disapp earance ▁in ▁the ▁after math ▁of ▁the ▁Second ▁G ig antom ach y . ▁ ▁Hol ly ▁and ▁La ure l ▁Victor ▁– ▁Hol ly ▁and ▁La ure l ▁are ▁a ▁pair ▁of ▁sister s ▁and ▁daughters ▁of ▁N ike . ▁As ▁per ▁their ▁up br ing ing , ▁they ▁are ▁very ▁compet itive ▁and ▁refuse ▁to ▁be ▁made ▁second , ▁hence ▁why ▁they ▁are ▁placed ▁as ▁co - c oun sel ors ▁of ▁the ▁N ike ' s ▁cabin , ▁otherwise , ▁as ▁Kay la ▁puts ▁it ▁" they ▁would ' ve ▁taken ▁over ▁the ▁camp ▁by ▁now ▁and ▁proc laimed ▁a ▁dict ator ship ". ▁Apol lo ▁describes ▁them ▁as ▁looking ▁like ▁the ▁" g orge ous , ▁f ero ci ously ▁athlet ic ▁African ▁n ym ph s " ▁that ▁he ▁and ▁Ar tem is ▁used ▁to ▁hang ▁out ▁with ▁at ▁Lake ▁T rit on is . ▁ ▁Jacob ▁– ▁Jacob ▁is ▁the ▁leg ion ▁Aqu il ifer ▁( which ▁is ▁an ▁e agle ▁bear er ) ▁of ▁Camp ▁Jup iter . ▁His ▁god ly ▁parent ▁is ▁unknown . ▁ ▁J ake ▁Mason ▁– ▁J ake ▁becomes ▁the ▁head ▁of ▁the ▁He pha est us ▁cabin ▁after ▁the ▁death ▁of