User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-1411267-20130908194619/@comment-3146930-20130910220303

The problem I have with Piper's picture is that it doesn't exactly age well and feels more like a picture for her knife rather then one for Piper.

Anyway, when I say it doesn't age well, there is an image in her knife showing Enceladus. However Enceladus was a one-book villain that ultimately wasn't even killed by Piper. Most of the other pictures, mostly the early ones from the first series, have some kind of characteristic that never really changes. Percy is shown with Riptide, Annabeth with her invisible cap, and I believe Nico when not in Camp Jupiter still has his aviator jacket. Piper will always have her knife, but what she is looking at kind of died already.

I also don't like that you can't see her face clearly. Every picture so far has a clear view of the characters' faces, except Piper. It looks like someone snuck up behind her and took a picture of her while she was looking in her knife. It isn't so much a portrait as it is a surprise snap-shot.