Robin was troubled by Asta's tearstains. I found them difficult to deal with using my conventional method of selecting the offending color and then desaturating it (in this case I thought red would be a good choice to desat.) so I wound up using the sponge tool in the discolored area and then the dodge tool to lighten it (50% strength). I found that the area then looked too grey compared with the rest of the peachy/sepia-ish tone, so I just converted it to grayscale and I think it looks better.