Achilles (アキレス, Akiresu) are one of the many enemies in the Hyperdimension Neptunia Series. They're large winged mechas, usually they're bosses or dangerous enemies.
Achilles are Risky Bosses, as such, they won't actively pursue the player.
Achilles have 2 skills:
Above 50% HP
Achilles' main skills are Slash and Paralyze Attack, they use these skills almost equally, however Paralyze Attack seems to be used a bit more often. When they run out of SP they only use Slash.
Below 50% HP
When Achilles' HP go below 50%, the odds of them using Paralyze Attack increase.
Achilles don't have direct partners.