Okay just want to point out that Luna is not dead cause Lisa Yamada (Luna's actress) never said she was leaving nor did the show confirm it! Li may said she died but she actually didn't here is why!
There has been a leak from September that Luna is in fact still alive
Some suggest Li might try to do something to Luna, kinda related to Finn of how Li kept him hidden!
Luna nearly died during surgery but was brought back to life by Li
Li wouldn't Bridget take Luna to recovery since they were gonna arrest her afterwards implicating Li might have a plan for Luna.
It would too easy to kill Luna right off the bat that quick