Why is this supposed to be Faris? One thing where all the Faris pics in my collection are pretty consistent is that she has green eyes. The girl in the pic has blue eyes, just as the DQ3 senshi usually has.
The only thing reminiscent of Faris is the green headband, and that shows up in only a third of her pics. The braids are uncommon for either character, and the description on the site does not mention Faris or FF at all.
The source itself gives FF5 AND Faris as tags. The description does not operate alone. If we only went by description for everything, there are a decent number of pictures taken from pixiv that only have something like "..." in the description.
The complaint here seems to be more about what the artist did than improper tagging.