Travis and Lottie
Season two establishes the concept that Travis and Lottie stay in touch, or get back in contact, after their return from the Wilderness. The 1996 timeline showed how Lottie represented hope to Travis that Javi could be alive, while Natalie represented the idea that Javi had died. As adults, Lottie is present when Travis tries to trigger his connection to the Wilderness, only to die when Lottie becomes distracted by a hallucination. All of this suggests that, for the most part, Lottie and Travis had a potentially more positive relationship during their time in the Wilderness. Except, season three presents a much darker look at Travis and Lottie's relationship.
In season three, Lottie and Travis are paired up as spending most of their storyline together as Lottie locks onto Travis as the main person now connected to the Wilderness. They share a kind moment together when Lottie confides in Travis about her past with doctors. Yet, Travis, after spending so much time getting high from spending time with Lottie and trying to connect to the Wilderness, eventually aims to get Lottie's attention off of him and onto Akilah. Still, things become more emotionally charged when the frog scientists appear and the survivors finally have an opportunity to go home, if only Lottie had not lit the initial flame of declaring she was staying.
Although Shauna is clearly in charge at this point, ruling the group in fear, Travis still relates the group's potential to stay on Lottie, and if he can get rid of Lottie, maybe they have a chance. The iconic pit with spikes from the original pilot was revealed to initially be used for Travis to trap and kill Lottie as a way to encourage the Yellowjackets to go home. Travis's desperation and willingness to end Lottie's life if it means everyone gets to go home is a much darker approach to their dynamic than Yellowjackets had teased before, and adds layers to questioning how they get back on a more positive footing in the future. While the entire group is affected by these shared traumatic events, there are now even more questions about what this means for how Travis and Lottie relate to each other now that Travis has tried and failed to kill her.