Percy Weasley did a double take when he saw Hermione show up on Draco's arm, but other than that, no one at the rehearsal reacted to her choice of date. Hermione suspected Ron and Padma prepped the families for it, and she was grateful for their tact. Of course, they didn't know she and Draco were engaged. Hermione didn't want to take any attention away from the happy couple by announcing their engagement, so she glamoured her ring. 