Alicia is not too happy about it all, since she enjoyed the DA and F&G's presence and Dumbledore's not-quite-as-strict-as-Umbridge-ness. But she will take advantage of the chance to create chaos.
Cho is upset that everybody is being rude to Marietta and that Harry can't accept that she's actually a good person. She thinks the Weasley twins are barking mad to leave before they've taken their NEWTs -- but then, from what she's seen of their younger siblings, that's not too suprising. Hm, that's odd... the older Weasleys weren't so bad.
Hannah is not happy that the DA was disbanded, especially because of all the tension between the Puff girls now that Hannah & Susan's secret has been semi-revealed. As a Prefect, she's having trouble dealing with the disorder that people are creating for Umbridge because she doesn't know whether she should uphold her responsibilities or stay loyal to Dumbledore.