Achilles

Achilles, the son of Peleus and Thetis, was
the greatest of all Greek heroes who took part
in the Trojan War. Knowing that her child
was destined to either die the death of a glorious warrior or live a long life in obscurity, Thetis bathed Achilles as an infant
in the waters of the River Styx, thus making
him all but immortal: only the heel by which
she held him remained vulnerable.