Board Thread:General Discussion/@comment-24252521-20171123044845/@comment-35304678-20180415075117

Valentine only appeared in 3rd series, not in the HoO Series, so Piper couldn't call her as 'loser' and couldn't bash her by saying 'bunch of loser'.

And Piper tecnically called Lacey as 'bunch of loser' too, in the Lost Hero.