ive ▁towards ▁Per cy ▁and ▁S ally , ▁the ▁latter ▁of ▁whom ▁leaves ▁him ▁in ▁The ▁Light ning ▁Th ief . ▁It ▁is ▁later ▁known ▁that ▁S ally ▁Jackson ▁married ▁G abe ▁U g li ano ▁as ▁G abe ▁was ▁so ▁mort al ▁and ▁human ▁and ▁gave ▁off ▁such ▁a ▁st en ch ▁that ▁no ▁mon ster ▁would ▁ro am ▁anywhere ▁near ▁his ▁surr ound ings . ▁As ▁Per cy ▁was ▁a ▁strong ▁dem ig od ▁( a ▁son ▁of ▁P ose id on , ▁one ▁of ▁the ▁" Big ▁Three ") ▁and ▁such ▁dem ig ods ▁attract ▁mon sters ▁more ▁than ▁usual , ▁she ▁had ▁to ▁marry ▁him ▁to ▁protect ▁Per cy ▁from ▁danger . ▁ ▁Between ▁the ▁time ▁of ▁The ▁Battle ▁of ▁the ▁Lab yr inth ▁and ▁The ▁Last ▁Olymp ian , ▁S ally ▁Jackson ▁mar ries ▁Paul ▁Blo f is , ▁a ▁man ▁she ▁met ▁in ▁a ▁writing ▁sem inar . ▁Per cy ▁lik es ▁and ▁respect s ▁his ▁new ▁step - father ▁and ▁eventually ▁reve als ▁to ▁him ▁that ▁he ▁is ▁a ▁dem ig od . ▁Though ▁understand ably ▁shock ed , ▁Paul ▁still ▁stays ▁with ▁the ▁Jackson ▁family ▁and ▁accepts ▁Per cy ' s ▁complicated ▁life . ▁In ▁The ▁H idden ▁Oracle , ▁Per cy ' s ▁mother ▁is ▁seven ▁months ▁pre gn ant ▁with ▁Paul ' s ▁child ▁( Per cy ' s ▁half ▁sister ). ▁ ▁Per cy ▁has ▁a ▁brother ▁named ▁T ys on , ▁who ▁is ▁a ▁cy clo ps . ▁Though ▁Per cy