The ornamental design for character line for rear portion of automobile, as shown and described.
FIG. 1 is a front perspective view of the front, top and right side of character line for rear portion of automobile showing my new design;
FIG. 2 is a rear perspective view of the rear, top and right side thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a top plan view thereof.
The bottom is unornamental.
The broken lines shown are included for the purpose of illustrating the unclaimed portions of character line for rear portion of automobile and form no part of the claimed design.