A lot of things happen very quickly here, so let me break it down for you, character by character:

Yumie activates the time machine.

Heinkel grabs Nenene and follows.

Yomiko, of course, flies after her.

Alucard grabs Integra, who has begun shifting rapidly, and follows as well.

Seras hefts the ailing Pip (oh, the volume 7 irony) and brings up the rear.

Emma and William realize that there’s not going to be a punch line. Again.