▁from ▁Charles ▁Beck endorf . ▁In ▁The ▁Last ▁Olymp ian , ▁he ▁proves ▁himself ▁to ▁be ▁a ▁capable ▁f ighter ▁and ▁is ▁named ▁a ▁general ▁of ▁P ose id on ' s ▁arm ies . ▁Per cy ▁is ▁at ▁first ▁res ent ful ▁of ▁him ▁as ▁a ▁brother , ▁while ▁An nab eth ▁is ▁open ly ▁host ile ▁towards ▁him ▁because ▁she ▁was ▁almost ▁killed ▁by ▁a ▁cy clo ps , ▁but ▁both ▁accept ▁him ▁after ▁their ▁quest ▁together ▁in ▁the ▁Sea ▁of ▁Mon sters . ▁T ys on ▁is ▁close ▁with ▁several ▁characters ▁and ▁mag ical ▁cre atures ▁in ▁the ▁series , ▁including ▁Rain bow ▁the ▁hi pp oc amp us , ▁the ▁hell h ound ▁Mrs ▁O ' Le ary ▁and ▁the ▁har py ▁El la , ▁who ▁eventually ▁becomes ▁his ▁girl friend . ▁In ▁The ▁Battle ▁of ▁the ▁Lab yr inth , ▁T ys on ▁is ▁revealed ▁to ▁be ▁afraid ▁of ▁sat y rs , ▁including ▁Gro ver , ▁he ▁man ages ▁to ▁conquer ▁this ▁fear ▁after ▁a ▁quest ▁and ▁they ▁become ▁friends . ▁ ▁N ico ▁Di ▁Ang elo ▁N ico ▁Di ▁Ang elo ▁is ▁first ▁seen ▁in ▁The ▁T itan ' s ▁Cur se , ▁as ▁an ▁un c laimed ▁dem ig od ▁res cu ed ▁by ▁Per cy , ▁An nab eth , ▁Th alia , ▁and ▁Gro ver . ▁At ▁the ▁end ▁of ▁the ▁novel , ▁it ▁is ▁revealed ▁that ▁N ico ▁is ▁a ▁son ▁of ▁H ades . ▁He ▁appears ▁in ▁The ▁T itan '