u/Hollywill06

So far, we have 2 Lethals in the forms of Dandy and Dyle, both of them embody one of the seven deadly sins.

Dandy represents Greed because he wants tapes we must give him for items in his store. If we don’t give him tapes more than 3 times, Dandy is going to lose his cool and attacks us within one of the next 10 floors. Once his twisted floor is completed, he’s back to normal in the next even-number intermission.

Dyle represents Envy because he kinda wants to appear in the show, but Arthur and Delilah wouldn’t let him, causing him to feel isolated. Interestingly, his twisted form resembles a snake, a symbolism to Envy.

However, as I said before, they’re the only two lethal in the game as of June 2026, so we might meet the other 5 lethal toons who would respectively represent Lust, Gluttony, Sloth, Wrath and Pride.

We all know about the good old voting system; we get to choose who to save or eliminate (depending on the season), and in the next episode, they're gone for the rest of the season. As a long-time BFDI fan, I notice that eliminations have the chance to cause consequences.

Interestingly, we might've been writing the story of the BFDI universe because if certain characters get eliminated, it will impact the saga (such as them remembering their eliminations, potential redemption arcs for eliminated characters, etc).

You see, we have the fate of the Battle For Dream Island series in our hands, and we might need to be careful, as there could be thousands of lost opportunities that were thrown to the massive scrapyard of ideas, for example, had Coiny been eliminated in BFDIA 2 would have given Doughnut (who would be safe in this alternate timeline) more scenarios, possibly an earlier redemption arc.

This is called the Butterfly Effect, where a single change can cause serious consequences. Pencil's BFB elimination is a prime example. She was bad in BFB 1, and everyone voted her off because of this, but she rejoined almost 7 years later, and her bad behaviour has evolved into villainy territory, to the point where she nearly doomed the BFDI world in TPOT 15. Pencil might cause even more chaos during TPOT 23-25, but there's still a chance Pencil will get a redemption arc (similar to how Book became a better person in BFB 14 during the Lava arc).

Now let's jump into another universe where Pencil is declared safe, and Fanny is eliminated. Things might be a bit difficult to write for me, so I'll give it a try (though I could be possibly proven wrong)

Pencil's perspective: After Fanny got eliminated, Pencil is likely going to be still nasty, but an early redemption arc is available for her to amend some of her ways before the infamous BFB 16 split (The audience was quite upset about the change back in 2020, but it died down a few years later). Pencil would've likely stayed with Four for two reasons: 1: She's an important and/or fan favourite (because I see Post-Split as an All-Stars season), and 2: Balloony's elimination happened because he's in a team with popular characters, making him a voting shield. If Pencil remains in BFB and Balloony switches to TPOT, Balloony kinda would've gotten more relevance (unless he gets eliminated early before TPOT 13, the episode with the storm). Her story in TPOT would also look different; she would get less screen time due to being a BFB-er, and the TPOT plot would look different.

Fanny's perspective: Because she was also a nasty contestant back in 2017, and her hateful personality would've been cranked up to eleven for being stuck in the EXIT for around 6-7 years (plz no 67 jokes). As for the EXITor rejoin in TPOT 12, this is where things get confusing, so I'm going to split it into 2 timelines

If Fanny didn't join TPOT: there's a likely chance Fanny might not join TPOT (cuz she'd be trapped in EXIT during BFB 16), causing Liy and Bracelety to join TPOT. Speaking of Bracelety, she would've gotten more character development and at some point, be hooked into an arc where Ice Cube is very angry with that bracelet's obsession with her, causing the "Broken Pedestal" cliche to come into play (you've seen this a lot in kid movies, where the protag's idol is either the bad guy or aren't great of their thing, but there's a chance the pedestal gets rebuilt). This arc would've fleshed Bracelety out. In the TPOT 15 timeline chaos, the universe would not get screwed over due to the lack of Pencil's presence; however, JacknJellify could potentially make someone else do the chaos by making them nasty.

If Fanny does join TPOT: Fanny might've been more aggressive, Fanny might likely do similar things TPOT Pencil does (taking her place). The difference is that Book would not stand up for herself in TPOT 17; this was the reason Book got the most votes in TPOT 19 (Book apparently seems to have elimination plot armour, even winning BFDIA in which I knew is destined to happen)

The 2 formats, Vote to Eliminate and Vote to Save, have advantages and disadvantages for the contestants. For VTE, it benefits the kind and fun characters, but it's bad news for those who have done bad things, are annoying or lack character. VTS might've done the opposite, benefiting the serious and/or popular characters while dooming the plot-useless characters (I'm looking at you, TPOT 10 Bomby). If they switch to contestant-voting, the story as we know it would be completely different.

So to conclude, BFDI is quite an experiment on how we control a fiction world.