A/N: Hey guys! EmmaKoeni here! I originally wrote "The Mysterious Half Sister of Aelita" in late 2012. Re-reading it now, I have decided that I will rewrite this story and improve it tremendously. Please enjoy!

Chapter 1: The sibling I have lost

Aelita's POV

Today is Saturday. Generally, that means we have school in the morning. However, I instead was in Jeremie's room, sitting on his bed while he worked away at his computer trying to discover the last pieces of my father's diary. Why were we doing this instead of our assigned lesson? Well, Jim went and broke his leg, therefore we could not be taught any gym unless the school paid for a substitute, which they wouldn't.

The sound of fast typing could not be unheard, until all of a sudden silence overtook everything. I looked at Jeremie, he returned the gesture. "I found another video Aelita, come watch it." he said in the same tone as he says every phrase - no emotion, just trying to get his message across. I get off from his bed and instead kneel next to his computer chair to get a good sight of the screen. It featured my father in the supercomputer room, presumably about to take himself and me into it's database. "Today, me and Aelita are finally going to be virtualized into Lyoko. I had planned a third avatar, for Aelita's half siste-" the words came out of the speakers before stopping to buffer, "-r, as it would have been nice for Aelita to have someone to join her even after not seeing her for 6 years when she was just a baby. Shamefully, I have no money, and her mother refuses to pay for a plane ticket from Japan." the video ended.

"Aelita, you never told me you had a half sister" Jeremie voiced out, sounding shocked. I didn't know what to reply back - I never realised I had a sibling, I thought I was an only child. "I didn't realise...?" was all I managed to exclaim.