▁C ud more ) ▁appeared ▁as ▁a ▁top ▁hen ch man ▁of ▁Luke ▁Cast ellan . ▁When ▁it ▁came ▁to ▁the ▁fight ▁at ▁Poly ph em us ' ▁la ir , ▁the ▁M antic ore ▁wounded ▁An nab eth ▁before ▁it ▁was ▁killed ▁by ▁Gro ver ▁Under wood ▁and ▁Clar issa ▁La ▁R ue . ▁ ▁Dr . ▁Th orn ▁– ▁A ▁M antic ore ▁in ▁human ▁form ▁that ▁appeared ▁in ▁The ▁T itan ' s ▁Cur se . ▁Dr . ▁Th orn ▁is ▁the ▁vice - pr incipal ▁of ▁West over ▁Hall ▁( the ▁school ▁that ▁Bian ca ▁and ▁N ico ▁di ▁Ang elo ▁attended ). ▁He ▁has ▁two ▁eyes ▁of ▁different ▁colours , ▁one ▁blue ▁and ▁one ▁brown . ▁Dr . ▁Th orn ' s ▁nost r ils ▁f lare ▁up ▁when ▁he ▁tal ks . ▁He ▁speak s ▁in ▁a ▁French ▁acc ent . ▁Dr . ▁Th orn ▁tries ▁to ▁kill ▁people ▁by ▁using ▁th orn - like ▁objects . ▁He ▁is ▁angry ▁that ▁in ▁the ▁ancient ▁days , ▁the ▁God s ▁forced ▁him ▁to ▁live ▁out ▁in ▁Pers ia , ▁where ▁he ▁never ▁had ▁any ▁decent ▁challeng es , ▁as ▁he ▁would ▁in ▁An cient ▁Greece . ▁Dr . ▁Th orn ▁is ▁killed ▁by ▁D ion ys us . ▁ ▁Mer people ▁– ▁A ▁race ▁of ▁sea ▁cre atures ▁that ▁are ▁half - human ▁and ▁half - fish . ▁The ▁male ▁mer people ▁are ▁called ▁M erm en ▁while ▁the ▁female ▁mer people ▁are ▁called ▁Mer ma ids .