Rachel is a 16 year old along with her borther Tyler who is 12. There little sister Violet was murdered durring a game of Soul Heroes for the three of them. Rachel has always wanted to become a master duelists with the cards Soul Heroes since the death of her little sister and she has been training with the cards for 5 years.
She dueled her teachers and classmates for the Soul Heroes condender championship againsted the murderer. Violet became champion but died getting murdered of a slit neck after the game. Rachel wants to win the title herself and make the murderer pay for what he did.
As for Tyler he is just a beginner being taught in the same school only in the beginners classroom also getting help for Rachel. He thinks one day we can beat Rachel for the Championship and be known as the Soul Master.