I keep thinking about the death theory,
and I can’t help but theorize that going into the 6th season, the writers wanted to bring the shock of death to the show like they did in LS,
Thinking in that direction, they will probably kill someone who was significant but in overall not as significant as the main characters.
That can be anyone from Lucy (I actually doubt it - for a lot of reasons), to Ravi (they better not, I will be completely devastated, but telling his story partially in 5x08, could have been an overshadowing), to (and this is a true 9-1-1 writing style) Taylor Kelly who somehow covers every event in LA, and killing her will put Buck in parallel with Eddie - again.
Shannon was killed after she and Eddie broke up, and Eddie was still broken up about it, I’m positive Buck will be just as broken up about it.
Lucy was not significant enough in the grand scheme of things to kill at this stage and for it to hurt properly, especially to Buck.
So I’m thinking Ravi or Taylor.
All I know is - it better not be Ravi!