The ornamental design for a personalfan, as shown and described.
FIG. 1 is a front, left side perspective view of a personal fan showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a rear elevational view thereof.
The fan blades and the handle shown in dashed lines in FIG. 1 are included for the purpose of illustrating environment and form no part of the claimed design.