[TOMT] Obscure fantasy/sci-fi book series early 2000s
Back in middle school (2001-2003), a classmate introduced me to a fantasy/sci-fi book series. I really enjoyed it but never finished it and for the life of me cannot remember the name of the series or how many books there were. I've tried searching over the last couple of decades but have not been able to find it. This sub started showing up on my feed and thought I would see if maybe anyone here could help me.
The series followed 3 main characters from different worlds and are eventually transported to a new world where they meet. One was a street kid from like NY or some other similar urban city that did card trick scams or something. The next was another guy from a world where everyone never went outside and only interacted through a virtual reality program. The last was a girl, I think her name was Helene, and she was pretending to be a boy at first. I'm pretty sure she was princess in her home world but wanted so badly to be a knight.
They eventually meet another character that I think was called The Oracle that would help them in the new world they ended up in.
Names are very important in this world. So much so that you should never give your real name to people you do not know or trust.
There is also another written language (might be a coded language) that three characters have to figure out. The VR guy figures it out and realizes it's the normal English alphabet but reversed.
Thanks in advance to anyone that knows or can help me figure out the name of this book series!