John got out of the sleek black car and looked up at the mansion Anthea brought him to. He sighed and walked in, not even bothering to knock. Mycroft was there waiting for him. Without saying a word, he turned around and lead John down an elaborate hall and into a room at the end. Motioning for John to take a seat in one of the comfortable plush chairs, Mycroft sat across from him.

"Would you like some tea, Dr. Watson?" Mycroft gave him a thin lipped smile.

"Uhm, sure. Thanks.." The smaller man replied caught off guard. He was expecting a straight to the point favor involving spying on Sherlock.

Mycroft waited until the tea was served and John was comfortable before saying, "I brought you here for a very specific reason."

"Right. I could've guessed as much. So what is it?"

"Do you know why my brother is so cold, Dr. Watson?" Mycroft asked staring at the small man.

"No... I always thought he was just born like that..." John trailed off.

"Not at all. It has to do with a woman."

"Woman? Sherlock said that women weren't his area of expertise." Confusion swept over John's face.

"I'm sure he did, but that is now. He's been trying to delete her from his mind for 4 years now."

"Why would he do that?"

"She was the first and only person to ever penetrate all his walls. She was his match in every way. Deductive, intelligent, musical, and a genius in nearly everything."

"Such a person besides Sherlock actually exists?" He had thought that Sherlock was one of a kind.

"Oh yes, however, where Sherlock was usually antisocial, uncaring about everybody but her, and didn't stop to think of how is actions affected others... She was outgoing, loving everyone especially him, and felt an enormous amount of empathy. She made up for what he lacked and saved him from himself." Mycroft sighed.

"Who is she?" John asked.

"Addia Tyler."

John looked confused as he said slowly, "Why does that name sound familiar?"

"It should Dr. Watson. Four years ago, there was a huge public service announcement declaring her missing. No one in all of Great Britain could have missed it."

John suddenly remembered the emergency broadcast. They had interrupted the telly and radio to describe the girl. There were posters and ads everywhere all showing a slim blonde girl with unusual violet eyes. "Right, did they ever find her?"

Mycroft shook his head saying, "Even with the best detective in the world and every official looking for her, they couldn't find this one girl."

"You mean Sherlock?"

"Yes, she was his best friend and later his girlfriend."

"Wait, how?" John asked coughing as he choked on his tea.

"They met in fifth grade. At that point he was actually very close with me, believe it or not. He was already incredibly deductive and everyone was uncomfortable around him, even going as far as to hate him. Addia transferred in the middle of the year because her mother and father died, leaving her and her insane, abusive brother. They moved in with their drunk aunt. The rest of the kids warned her to stay away from Sherlock, but she ignored them. Addiana went straight up to him and chatted merrily away, earning her the same treatment from the kids that they gave to Sherlock. He, however, was excited that someone actually wanted to be his friend."

*Flashback 18 years ago*

"Myc! Myc!" Mycroft winced at the nickname his ten year old brother gave him.

"Yes?" He asked turning around to see an excited Sherlock barreling toward him.

As Sherlock reached his brother he pulled on his sleeve, causing Mycroft to wonder what happened to make his little brother actually take a break from his usual stoic attitude.

"You'll never believe what happened at school! There's this new girl and she came up to me and didn't say mean things to me even after I observed her and told her what she did that day! She said I was amazing and she wants to be my friend!" Sherlock babbled excitedly.

Mycroft's heart broke a little to hear how just one girl being nice to his brother was a cause for joy. "That's good Sherlock, you should invite her over."

"But Myc... What if she's trying to trick me?" The shadow that crossed over his face was heart wrenching.

"I think it's worth a shot," Mycroft smiled at him and ruffled his curly black hair.

Sherlock's smile could have lit up the entire room and he announced he would invite her over tomorrow before he bounded away.

The next day, Sherlock came home with his new friend. Mycroft came downstairs at the sound of their chattering and couldn't help but stare. Sherlock was sharing cookies with a small blonde girl and laughing, actually laughing. The girl was staring at Sherlock with admiration in her striking violet eyes.

"Whose your friend Sherlock?" Mycroft asked smiling at the two kids.

"This is Addiana Tyler." Sherlock beamed.

"I see, I'm Sherlock's brother, Mycroft."

"Yes, I could tell." She smiled at him. "Its nice to meet you."

Sherlock grinned, "Isn't she amazing?"

"Sherly, I wouldn't count myself as amazing with you here." She giggled.

Mycroft chuckled as Sherlock felt what it was like to have an embarrassing nickname.

"So what do you want to be when you grow up Addia?" Sherlock asked shyly.

"A detective!" Addia said grinning proudly.

"Me too!" Sherlock said giving her a high five.

From that day on, Mycroft was stuck playing the bad guy in their detective games.