Nymphadora Tonks was a rare specimen she was a metamorphagus. She could change her appearance at will. She could be anyone she wanted. Presently, since she was bored she was impersonating the Transfiguration professor and Deputy Headmistress Professor McGonagall which consisted of changing her hair to black and her eyes to green. She would scold many of the students. Little did she know she had scolded a very gullible first year into thinking that he had detention.
"Mr. Roberts, what are you doing here?" Professor McGonagall asked the little boy.
"I don't have detention?" he asked confused.
"No, who told that you did?"
The younger boy said sheepishly. "You did."
"You can go, Mr. Roberts."
The little boy left the room relieved. McGonagall smirked to herself she knew exactly who did this. There was only one person who could. She had to think of a perfect way to get back at the mischievous metamorphagus.
The opportunity didn't come along until almost a decade later. McGonagall could see that the young girl fancied a certain former professor. She didn't have the ability to change her appearance at will like young Dora so she had to use the next best thing Polyjuice Potion. She was now prepared to serve up some long planned revenge.
She walked in before an Order meeting to see Remus chatting with Molly. She strolled over to the man.
"Hi Nymphadora," Remus smiled at her.
"Hi Remus," McGonagall as Tonks replied.
The two just stared at each at each other.
"I fancy you very much."
Before he could respond the real Tonks walked in looking confused.
"Who are you?"
Her features began changing into her own.
"Professor McGonagall, whatever did I do to you?" a mortified Tonks asked.
The older professor smirked and said. "This will teach you not impersonate me."
Tonks couldn't remember at first then realization dawned in her eyes. She deserved her not so secret crush revealed.