Hermione takes the phaser from him. And gently places it to her belt, where she has created a little holster for it. Due to the magnetic fields of the technology, she can not place it in her little magical beaded bag.

"Each Patronus takes on a different animal form, depending on the traits of the wizard casting the spell." Hermione explains.

She twirls her wand, and the otter forms again. Swimming around the air, excited for a new task. "And as you have seen, a Patronus can be used to get messages to other people."