Curate, connect, and discover
In Season 4 when they were in the same dojo, hell, even in Season 3, I feel Robby and Tory should've had a firey rivalry fueled by hatred because like... To Robby, Tory's the bitch who attacked his girlfriend and was the main catalyst that sparked the event that practically ruined his life.
To Tory, Robby's the asshole who kicked her boyfriend off a rail and broke his spine.
Until they eventually saw eye to eye, I think Robby and Tory should've been rivals for a little bit.