▁( the ▁ability ▁to ▁mag ically ▁conv ince ▁people ▁to ▁do ▁what ▁the ▁person ▁in ▁question ▁says ) ▁and ▁is ▁described ▁as ▁beautiful ▁by ▁Jason ▁Grace . ▁She ▁car ries ▁a ▁kn ife ▁called ▁K ato pt ris ▁( pre viously ▁owned ▁by ▁Helen ▁of ▁T roy ) ▁that ▁shows ▁her ▁vis ions ▁of ▁the ▁future . ▁She ▁begins ▁d ating ▁Jason ▁Grace ▁( son ▁of ▁Jup iter ) ▁during ▁the ▁series . ▁ ▁Leo ▁Val de z : ▁A ▁ 1 5 - year - old ▁son ▁of ▁He pha est us ▁who ▁can ▁control ▁fire ▁( a ▁very ▁rare ▁ability ). ▁He ▁is ▁famous ▁among ▁his ▁cabin m ates ▁for ▁repair ing ▁the ▁autom ated ▁bronze ▁drag on ▁Fest us ▁gone ▁wild , ▁who ▁had ▁given ▁more ▁experienced ▁camp ers ▁life - alter ing ▁dis abilities . ▁He ▁leads ▁the ▁building ▁of ▁the ▁Ar go ▁II . ▁Leo ▁begins ▁d ating ▁Cal y ps o ▁in ▁The ▁Blood ▁of ▁Olymp us ▁after ▁being ▁str and ed ▁on ▁O gy gia ▁earlier ▁in ▁the ▁series . ▁ ▁N ico ▁di ▁Ang elo : ▁A ▁ 1 4 - year - old ▁son ▁of ▁H ades ▁who ▁has ▁power ▁over ▁the ▁dead ▁and ▁the ▁ability ▁to ▁“ shadow ▁travel ” ▁long ▁distances . ▁He ▁is ▁the ▁only ▁dem ig od ▁who ▁knew ▁about ▁both ▁Cam ps ▁before ▁the ▁war . ▁N ico ▁begins ▁d ating ▁Will ▁Sol ace ▁during ▁the ▁time ▁period ▁en comp ass ing ▁the ▁end ▁of ▁“ The ▁Blood ▁of