Lost Dragons (ロストドラゴン, Rosuto Doragon) are recurring enemies in the Hyperdimension Neptunia Series. They're enormous bipedal dragons, they generally appear as Dangerous Bosses.
Lost Dragons are Dangerous Bosses, as such, they won't actively pursue the player.
Lost Dragons have 4 skills:
Above 50% HP
Excluding Dragon Raid, Lost Dragons use all their attacks almost equally, being Circle Attack used slightly less. They can't run out of SP due to their high SP regeneration.
Below 50% HP
When Lost Dragons' HP is below 50%, they odds of them using High X. Gust increase, while the ones of them using Dragon Raid increase greatly.
Lost Dragons don't have direct partners.