Philip is a lean, light-skinned man with a pointed nose and long, shoulder-length brown hair, kept in a ponytail, with several strands kept loose atop his scalp. He had a small chin and pale-blue eyes. Philip dressed in what appeared to be 17th-century English formal attire, consisting of a waistcoat, thigh-length overcoat, and breeches. The coat was dark blue in color, with an upward-facing collar and golden buttons.

Cold, calm, smart, manipulative. 

Aster is a graduate student and assistant professor of Astrologer at the College of Wizardry. Aster pretends to be a clumsy, nervous and insecure guy so that people trust him more and do not consider him a big threat, but at any convenient moment he can throw off the "mask" of an insecure guy and skillfully manipulate people for their own ends.

Clumsy, nervous, two-faced, smart.

Caine is depicted as a nonsensical, over-the-top, vivacious ringleader. However, there's an aloofness about him and a clear significant disconnection towards the traumatic events that the characters around him are experiencing.
Caine is also shown to be secretive at times, often concealing or even lying about information related to his 'unfinished work'. So far, these ventures seem to be driven entirely by naive and misguided intentions.