beauty can hide true feelings ( Death Note: L love story)

L and Savannah met as childhood friends and stuck by eachother sides. She also had her twin brother Light. He then started to act weird and it was strange. Her and L both studied in phycology and graduated top of there classes in school by age of 15. But soon savannah became more cold and distance and not her usual happy self all of the sudden then disappeared without a trace. 5 years later by the age of 21 she became X. She was a secret detective and no one knew her true identity. She also had no records on her background files. what will happen when she is called into the kira case?