A mad scientist, a cyborg, a visionary, a man of god
A tall lanky man with a distracted air, well versed in arcanotechnology, parapsychology, and a collector of molds, spores, and fungus.
30 job types/classes for PCs in the Cosmic Era
An attractive older woman with more degrees than a thermometer
All spell casters gain their abilities through a form of demon possession. So in order to gain magical abilites, PCs must track down and trap demons. Of course there are some pretty powerful demons, if the demon is stronger than the PC, the PC could find themselves subjugated to the Demon's will.