▁and ▁is ▁later ▁killed ▁during ▁the ▁battle ▁at ▁Way station . ▁ ▁Hell h ound ▁– ▁The ▁Hell h ounds ▁are ▁a ▁main ▁part ▁of ▁Luke ' s ▁army ▁and ▁mon sters ▁in ▁general . ▁They ▁are ▁described ▁as ▁very ▁large ▁black ▁dogs ▁that ▁have ▁fire ▁g low ing ▁in ▁their ▁eyes . ▁They ▁were ▁also ▁mentioned ▁to ▁res ide ▁in ▁the ▁Field s ▁of ▁P un ishment . ▁Da ed alus ▁own s ▁a ▁h ound ▁named ▁Mrs . ▁O ' Le ary , ▁who , ▁unlike ▁her ▁relatives , ▁is ▁lov ing ▁and ▁loyal . ▁In ▁The ▁Last ▁Olymp ian , ▁a ▁bunch ▁of ▁Hell h ounds ▁are ▁seen ▁in ▁K ron os ' ▁army ▁where ▁they ▁sn uck ▁behind ▁the ▁dem ig od ▁lines . ▁ ▁Mrs . ▁O ' Le ary ▁– ▁Mrs . ▁O ' Le ary ▁is ▁the ▁only ▁friendly ▁hell h ound ▁to ▁ever ▁exist . ▁Quint us ▁( an ▁alias ▁of ▁Da ed alus ) ▁was ▁her ▁original ▁owner , ▁but , ▁after ▁asking ▁N ico ▁di ▁Ang elo ▁to ▁kill ▁him , ▁Per cy ▁becomes ▁the ▁hell h ound ' s ▁owner . ▁While ▁Per cy ▁is ▁in ▁the ▁" mort al ▁world ", ▁Charles ▁Beck endorf ▁takes ▁care ▁of ▁her ▁at ▁Camp ▁Half - B lo od . ▁She ▁res c ues ▁Per cy ▁while ▁in ▁the ▁Lab yr inth . ▁ ▁Hi pp ale ct ry on ▁– ▁An ▁end anger ed ▁animal ▁that ▁is ▁part ▁ch icken , ▁part ▁horse .