Tonks tripped over. An Immobilus hit her on the back. She froze, and someone took her wand.
"The Metamorphmagus," a voice said. Tonks felt someone touching her hair.
"Imperio!"
Change your eyes red, a little voice said in the back of her mind. Tonks tried to fight it. She screwed up her face in concentration.
Now open them.
A Lumos spell shone in her eyes, and her pupils contracted. The irises of both eyes were a bright, blood red. She muttered curses in her mind.
Close your eyes, the tiny voice said.
Her eyelashes fluttered, and the robed figure smiled.