Orff (Animorphs)

The Orff are a fictional alien species in K. A. Applegate's young adult book series, Animorphs. They are described as being vaguely humanoid, with three quick legs and a long flexible neck ending in a single large internally lit eye (and it is assumed from their spoken dialogue, a mouth of some sort as well.) The pupils of their eyes float freely about their eyes instead of being fixed in the middle. Their skin is almost completely translucent so that their vital organs can be seen by anyone looking at them. Jake guesses that the visible organs are decoys to draw attention away from the actual vital organs which are translucent. This invisibility allows them to go completely unseen in the dark by dimming the light that emits from their eyes.

In the hypothetical future Jake experiences in Animorphs 41: The Familiar, the Yeerks have won Earth and have gone on to conquer the Andalites as well as a few other unfortunate races. The Orff are assumed to be a more recently assimilated alien species – although, while the Orff are in league with the Yeerks, it is never explicitly stated that the Orff are actually Controllers (some evidence to support them being conquered by the Yeerks appears in the form of a handful of free children, among them a young Orff). On the street level of Earth's cities they act as a sort of police force, hunting down cripples and rebels. They are described as being physically stronger than a human, but not as much as a Hork-Bajir would be. A team of Orff are sent to spy on Jake when he tries to make contact with the Evolutionist Front, and for some time Jake doesn't know where they are because they can become invisible in the dark by dimming their eyes.