Harpy

From the tops of their lustrous heads to the curves of their bodies, harpies take the form of bewitching beauties, yet the wings and haunches of these creatures are those of a beast.

Harpies have a wingspan of nearly twenty feet and they have an undeniable grace when in flight. Their intelligence is that which you would expect from an animal, yet they are known to sing arias of such beauty that none can say whether the songs contain real language or nothing more than the simple cries of a beast.

Like most birds, they seem to have poor perception at night and avoid taking action during the dark hours, preferring to take their rest upon some safe perch. Yet there have been tales of harpies attacking by the light of the moon or the fiery glow of torches, so it will not pay to let your guard down at night.

The harpy’s song clouds human minds and lulls them into sleep. Once one harpy begins to sing, the others are likely to join in its song, so keep an ear open.

These can also be riden to 'fly' across the lands and waters in the game of Dragon Dogma

Tactics
Harpies are not difficult to take down, but they can become a nuisance.
 * For warriors, you can either use skyward slash or call them using your shield
 * Any class wielding a bow, such as a Strider, Ranger, or Assassin, can take them down with ease using their bows.
 * Mages can set them on fire
 * You can grab on harpies mid-air and use them to fly. Be warned they can regain control anytime and if they do they'll drop you which may lead to your death.

Trivia

 * The Harpies in Dragon's Dogma look very much like traditional ones from Greek Mythology.