>>33840694It was obvious if you watched Gura during the rust season finale but I'll spoonfeed you.
Mori spammed the world chat constantly telling Gura to come gamble with her instead of playing with the jp senpai which got so bad Suisei asked Gura what Mori was doing and Gura's response was to audibly cringe.
Then when Mori scurries out of the safe zone thinking the fighting was over Gura immediately hunts her down and headshots her after only a few sounds were heard over the open mic.
This is all on top of Gura making remarks about Mori during her rust streams that sounded like she was making snipes at her.