Faction: None (technically Vehicon but not really)
This is his outside shell, that hides this form:
Alt-mode: Dragon, kinda like this
Weapons, abilities, equipment: TBD
Bio: Megatron is trying his best to get rid of all organivmc life on Cybertron, including himself. He knows that before he could call a victory he must capture Manta Ray, who carries the key to his defeat without even knowing.
Name: Diagnostic drone
Weapons, abilities, equipment: flight, different gadgets that are stored in his hands, etc
Bio: Megatron's medical drone that helps him trying to turn himself into a fully technological being. He is cocky, arrogant, calm, and has a brittish accent.
But... You know... More ghostly.
Alt mode: jet
Weapons, abilities, equipment: typical ghost powers, etc.