<human>:  Was Achilles a direct descendent of Gaia?
<bot>: Yes, Achilles was a direct descendent of Gaia. Achilles was the son of a Nereid. The Nereids were the 50 daughters of Nereus. Nereus was the eldest son of the union between Gaia and Pontus. So Achilles was a direct descendent of Gaia.