ys on ▁In ▁The ▁Sea ▁of ▁Mon sters , ▁T ys on ▁is ▁introduced ▁as ▁Per cy ' s ▁bul lied , ▁child ish ▁friend . ▁When ▁Per cy ▁is ▁forced ▁to ▁take ▁him ▁to ▁camp , ▁it ▁is ▁revealed ▁that ▁he ▁is ▁a ▁baby ▁Cy clo ps ▁and ▁thus ▁a ▁son ▁of ▁P ose id on , ▁making ▁him ▁Per cy ' s ▁half ▁brother . ▁He ▁appears ▁in ▁The ▁Sea ▁of ▁Mon sters , ▁The ▁T itan ' s ▁Cur se , ▁The ▁Battle ▁of ▁the ▁Lab yr inth , ▁The ▁Last ▁Olymp ian , ▁The ▁Son ▁of ▁Ne pt une , ▁The ▁Mark ▁of ▁Ath ena ▁and ▁The ▁Blood ▁of ▁Olymp us . ▁In ▁the ▁films , ▁he ▁is ▁port rayed ▁by ▁Douglas ▁Smith . ▁ ▁T ys on ▁is ▁tall ▁with ▁un k empt ▁teeth ▁and ▁f ing ern ails , ▁brown ▁hair ▁and ▁eye . ▁He ▁is ▁ment ally ▁about ▁ 8 ▁years ▁old , ▁but ▁very ▁intellig ent ▁and ▁comp ass ion ate . ▁As ▁a ▁son ▁of ▁P ose id on , ▁he ▁shares ▁some ▁of ▁Per cy ' s ▁powers . ▁As ▁a ▁Cy clo ps , ▁he ▁is ▁imm une ▁to ▁fire ▁and ▁has ▁super ▁strength , ▁an ▁un c anny ▁ability ▁to ▁m im ic ▁voices , ▁en hanced ▁sens es , ▁and ▁understand s ▁the ▁" old ▁tongue " ▁( the ▁language ▁spoken ▁by ▁Ga ia ▁to ▁her ▁first ▁children ). ▁T ys on ▁also ▁becomes ▁an ▁excellent ▁sm ith ▁with ▁help