▁other ▁words , ▁they ▁possess ▁both ▁the ▁intelligence ▁and ▁some ▁of ▁the ▁physical ▁features ▁of ▁humans . ▁The ▁vast ▁majority ▁of ▁these ▁cre atures ▁are ▁friendly , ▁such ▁as ▁n ym ph s ▁and ▁cent a urs . ▁Un like ▁the ▁majority ▁of ▁Greek ▁cre atures , ▁these ▁be ings ▁are ▁also ▁un question ably ▁sent ient ▁and ▁tend ▁to ▁have ▁larger ▁roles ▁in ▁the ▁novel ▁series . ▁▁ ▁Ag ri us ▁and ▁O re ius ▁– ▁Hum ano id ▁be ars ▁that ▁were ▁a ▁result ▁of ▁a ▁union ▁between ▁a ▁woman ▁named ▁Poly ph onte ▁and ▁a ▁bear ▁due ▁to ▁the ▁power ▁of ▁A ph rod ite . ▁They ▁were ▁also ▁the ▁great - gr ands ons ▁of ▁A res ▁due ▁to ▁Poly ph onte ▁being ▁A res ' ▁grand d augh ter . ▁The ▁two ▁served ▁as ▁Luke ' s ▁hen ch men ▁in ▁The ▁Sea ▁of ▁Mon sters . ▁ ▁Ama z ons ▁– ▁A ▁tribe ▁of ▁female ▁war riors ▁who ▁usually ▁worship ed ▁god d esses ▁like ▁H era ▁and ▁Ar tem is . ▁Some ▁Ama z ons ▁appear ▁in ▁The ▁Son ▁of ▁Ne pt une ▁where ▁they ▁are ▁sent ▁to ▁their ▁comp ound ▁at ▁Re yna ' s ▁request . ▁They ▁also ▁run ▁the ▁billion - d ollar ▁Amazon . com , ▁which ▁they ▁use ▁as ▁a ▁source ▁of ▁cover ▁and ▁re venue . ▁Though ▁they ▁are ▁often ▁confused ▁with ▁the ▁Hun ters ▁of ▁Ar tem is , ▁the ▁Ama z ons ▁are ▁not ▁mis and rist s