I'll chime in with my own opinion
1, Darci's family is obviously very problematic, his grandma, Jackie resembles someone in every way, yes Aunt Jenny . They have the same glasses, they're just as good at gaming, and she even said something crazy about herself earlier, maybe about talking to the MC in the school bathroom? Also, she said her boobs weren't that big when she was younger and that fits perfectly. As for Darci's mom, I even thought she was another Jennifer before I even played EP4, but I dismissed that idea after seeing the finder's notice. As for the end of EP6, Darci showed the MC a picture of her mom being taken and her costume, which seemed a lot like saying that she was also a Traveler? But that doesn't fit the previous setup, so maybe another idea, if Jackie is Jennifer, then maybe there's a small traveling machine in the basement of Darci's house? And Darci's mom might be the key to this research, when the MC first saw her mom at Darci's house, I wonder if anyone else noticed that her mom had a scar on her face, which was in the same location as the Mystic's.
2, Has Skylar traveled back in time as well? Almost all the evidence is pointing to Skylar traveling back in time, not even for the first time, maybe she was a traveler before the MC? The most favorable evidence is twofold, firstly Lizzy, who once said in a conversation with Brad that she used to date a man, then gave the MC a meaningful look and told the MC that she was actually quite old for her actual age. Secondly, Skylar said she went to a friend's place, a cabin in the woods, during the time she was missing. Is it possible to infer from the above two points that the MC met and dated Lizzy from 1999 when she traveled back to 1999 at some point. But MC soon traveled back to 2019. And Skylar, at a time earlier than MC, traveled back to a timeline later than 1999, and also met Lizzy, but this time the travel was unintentional, just like the first time MC traveled, and Skylar went back to 2019 with Lizzy's help and mastered the travel. At the same time bringing Lizzy back to 2019 as well and Lizzy decided to look for MC in 2019 so she didn't go back to the post-1999 timeline, which explains why Lizzy said she and Skylar have known each other for a long time but Skylar didn't mention it because it's only a year or two or even a few days for Skylar while it's been 20 years for Lizzy. Lastly on why Skylar went missing for a week, maybe she's just going back in time to find out why luna is so against her being with the MC.
3, from Tiffany's recollection, it's not the first time that the MC went back to the school to save Tiffany in EP4. In other words, outside of MC's timeline, there's already "another MC" who did this, but the other MC might have lost in the final battle. So he goes back to 2019 and lets the 2019 MC start it all over again. And take control of the situation as a controller. Making sure everything doesn't go off track. If Mystique is the MC who came back in the future, is Aunt Jenny also coming back in the future?Darci's mom's name is also weird, gabby jennifer gilmour?Do we all not know what the MC's mom's full name is? Maybe tiffany gilmour?I would say that the missing person notice doesn't mean anything.Maybe it's not missing but someone back from the future is looking for Jennifer? Maybe she's the key person in the time travel device? One last point that makes me curious, the MC's default name in the game is jack and Ms. gilmour's name is Jackie?Could there be a connection?
4, shit ninja , almost certainly Darci who came back from the future, as evidenced by the small breasts, her purpose of returning to 2019 may be to save the MC who may have been beaten up?Or may be to keep everything following the lines?
But how about this, it's really a great work! Looking forward to EP7 can come soon!