We've already talked a bit about how Fanny hasn't proven to be the kind of heroine we might expect. I think that as we move into chapter 9, we begin to see that Edmund doesn't seem to be the type of hero we expect either.

It's humorous how Fanny seems to have Edmund on a pedestal, evidenced by her thoughts as she watches Edmund teaching Mary to ride. She's at once mooning over Edmund and jealous of Mary at the same time.
what could be more natural than that Edmund should be making himself useful, and proving his good–nature by any one? ... but Mr. Crawford, with all his boasted good–nature, and all his coachmanship, probably knew nothing of the matter, and had no active kindness in comparison of Edmund.

I've pretty well let him slide on his forgetfulness of Fanny. But in chapter 9, I think he proves he doesn't belong on a pedestal.
After Mary speaks disrespectfully of the church in the chapel at Sotherton, you know she didn't know about Edmund's future calling. Once they get out in the wood, she takes up the subject again interrogating him about it. The crux of the whole conversation is Mary's opinion at the end.
You really are fit for something better. Come, do change your mind. It is not too late. Go into the law.”

A couple more flirty comments and then she takes his arm.
“Thank you, but I am not at all tired.” She took it, however, as she spoke, and the gratification of having her do so, of feeling such a connexion for the first time, made him a little forgetful of Fanny. “You scarcely touch me,” said he. ...

I've compared Fanny to Elizabeth Bennett, because I like the spirit and pluck of Lizzy. But I can't help comparing Edmund now to Mr. Knightley, Mr. Tilney, or Mr. Darcy. It's hard for me to imagine any of those men being so dopey to completely ignore the words that had just come out of Mary's mouth and still be so taken in. Duh! Edmund is clearly not thinking with his head. He's so... human! But I definitely think here begins ENASUTH and it only goes downhill from here.