There are a number of things to remember when you start to use magic on a daily basis. The first is that magic is like electricity it can be harnessed, it has a myriad of uses, but one day when your not looking when your tired when you just don't think, your going to get a shock.

The next thing to remember is that for every person who uses magic successfully, who can limit the amount they use; there are hundreds of teenagers dabbling with things they just don't understand.

John's grandmother had one final piece of advice for him, years before. Of all the practitioners in magic, the sensible homely witches, the powerful sorcerers and the lazy accultists, there is only one kind of idiot who would ever experiment with the magical dead, and that's why you don't find many living necromancers.

These things were running through his head in the weeks after moving in with Sherlock Holmes. They worked together, the lived together, they ate (when Sherlock ate) together, John would even call them friends, but he had decided he could never tell the man about the magical world. This however was getting harder and harder with the deductive genius, constantly monitoring John like he was one of his experiments. During the last few weeks and especially during the case John liked to call 'The Blind Banker' Keridwyn had become his shadow. She was normally good at hiding, John had discovered, disappearing seemingly at will, she was also very good at keeping quiet when John needed her too, and despite the odd circumstances she never balked at any request he put to her. However in Johns head it was only a matter of time before his flatmate discovered her. To make matters worse when Sarah had visited him in hospital after the madness at the Swimming Pool, she had walked in on a corporeal Keridwyn sitting on his bed, checking his pulse. Luckily she had been in her teenage girl guise and had introduced herself as his cousin. Sarah had been charmed by the precocious teen and some quick lies had created a story of truancy and an unhappy home life. However Sherlock knew John didn't have an extended family, and he was dreading Sarah bringing his cousin up in conversation.

Sherlock of course had a lot to thank the sprite for, she had chased off his would be assassin in Soo Lin's flat, waiting until the detective had started losing conciseness, before using her true demon form to scare the man out of the building. She had created a balloon of air that had kept him and John underwater while the swimming pool had collapsed around them, and when the two men had passed out, dragged them to safety. However John was convinced if Sherlock knew of her existence it wouldn't be long before parts of her body ended up in their fridge and microwave. John also didn't think Sherlock would let him be, if he found out that John however unwillingly was in possession of enough magical power to control a Sprite. So when John came home from work, carrying two heavy shopping bags the last thing he'd wanted to see was Keridwyn in her demon form patrolling the street outside 221b, like the worlds ugliest guard dog.

"Keridwyn?" John had hissed

"I'm sorry John, but I've done something really bad" she looked down and dug at the concrete with her claws, he looked up and down the street "it's okay only you can see me" she explained.

John opened the door, and ushered her in, however she sat on the hallway rug and refused to go any further.

"What have you done?" he hissed as she shook her head and refused to move from the mat.

"I was asleep in your room, and well your friend walked in on me, so I ran, and waited for you to come home, sorry"

"How were you dressed?" he asked cautiously

"I wasn't?" she asked back, cocking her head

"Sorry no I meant, what did he see you as?"

"Oh, human"

Great thought John, he didn't know what would have been worse, Sherlock finding a tiny winged demon in his room, or him finding a naked underage girl asleep on his bed.

John rationalized his next steps he hadn't been arrested at work, so Sherlock hadn't done the normal thing of phoning the police. However Sherlock liked to ask perps their motives so maybe he was upstairs waiting for John to explain. Even Sherlock couldn't read the age difference between 15 and 16, so he could just front it out, nothing illegal, possibly a bit dirty but Sherlock was junkie how critical could he possibly be. However John was a good man, he liked Sherlock; he didn't want him thinking he was scum like that. He told Keridwyn to become corporeal, human and after a false start clothed. He was going to face this head on he decided, and if he could get away without mentioning the magic world all the better.

"Sherlock?" John called trying to keep his voice reasonable and measured as he walked into the living room. His flatmate was lying on the sofa with his eyes closed; his right hand cupped over his left arm under the elbow, John briefly counted four nicotine patches.

"John" Sherlock acknowledged, "nice to meet you again Miss" he countered to Keridwyn. John started to speak but Sherlock sat up and interrupted him. "If you don't want to tell me John you don't have too, I trust I'm good enough at my job to know that anything you said would be a lie. I trust you John, it's just a shame you don't trust me." He stood up and walked to his bedroom slamming the door, and leaving John and Keridwyn alone.

"That could have be worse," she said.