Nephilim

Nephilim is an extraterrestrial being of unknown origins. She appears as a floating glowing blue angel, and primarily follows the main character Eliot G. Ballade around.

She initially is seen as a formless orb, and takes the shape of Tim's model angel after the meteor hits Dinosaur Island. It is later revealed that the meteor is Nephilim's physical form, while the angel is her spirit form.

She isn't capable of speaking, and instead communicates through telekinesis and cryptic visions. Throughout the game, she only communicates with Eliot and Janine King.

In-Game
Nephilim floats around Eliot for the majority of the game. Because she's a human-sized flying glowing object, her 3D model frequently gets in the way of the camera, obstructing your view.

She reaches her final form after she enters and emerges out of Jascony. After Eliot/Dogs destroy Jascony, she grows wings, and flies into space. There, she forms into a giant planet-sized egg that forms stingers on its outer edge. The stingers shoot off into different parts of space, implying the existence of other "Jascony"s.