With respect to a Lone Electron universe, let’s consider…
ACCELERATION/DECELERATION: None. The same argument applies as with velocity.
ARROW OF TIME: If there is no time experienced by the Lone Electron, then there can be no arrow of time either. In short, the Lone Electron has no experience of a past, present, or future.
CHARGE: Yes, the electron has a charge of minus one or in other words a negative charge of one unit. However, in order for charge to be meaningful, it has to be acting with or against another charge of which there is none.