Hi. I'm new. Please tell me if I'm doing anything wrong!
Just thought - Gaia posted on social media a photo of her and a friend dressed up for Halloween. It seems likely that's the night she had a one-night stand. She later posted about being ignored by the man and about exposing a paedo.
Gaia's 19, but she was dressed up as a sexy schoolgirl. PE is much older than her, and if he's the one she had a one-night stand with, given the age gap and her outfit (and possibly comments made to her either about schoolgirls or finding her attractive when she was an actual schoolgirl) I think it's highly likely he's the one she's 'exposing.' Bear in mind she's grown up with DE, NE and possibly PE too and known them as a child.
My hypothesis is that she went to RD's to confront PE, who was living there. There were comments about her staying there recently - it's a 2-bed flat - one bedroom seems to be RD's, the other PE's. NE would have seen her 'exposing the paedo' on Facebook, as they're friends on social media. When she confronted PE, an altercation led to her death. RD was present. NE may or may not have been.