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
At regular intervals, a god takes control of your world's weather. Choose the gods at random each turn of the interval and begin applying their effects subtly. Their power will depend on the strength of those who worship them.
For civilised people, worship of a god actually wanes during that god's month in an effort to reduce their potential destructive effect.