Aroma Diffuser

FIG. 1 is a front, top perspective view of an aroma diffuser, showing my new design; FIG. 2 is a rear, bottom perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a left-side elevational view thereof; FIG. 6 is a right-side elevational view thereof; FIG. 7 is a top plan view thereof; FIG. 8 is a bottom plan view thereof; and, FIG. 9 is an enlarged view of the area labeled 9 in FIG. 7 . The dash-dash broken lines in the drawings illustrate portions of the aroma diffuser that form no part of the claimed design. The dot-dash broken lines in FIGS. 7 & 9 depict the boundary of the enlarged view and form no part of the claimed design.