Despite Taco trying her best to help her team, Book and Lollipop both believe she abandoned her team after getting trapped in a jawbreaker in "Lick Your Way to Freedom". As of "Get to the Top in 500 Steps", Lollipop is on better terms with Taco, but Book still thinks otherwise. Taco, however, does not know Lollipop has forgiven her, since she has not interacted with her since "Today's Very Special Episode".
Episodes suggesting a conflict
In "Why Would You Do This on a Swingset", Taco is still stuck in a jawbreaker from the episode prior. She overhears Book talking about her possibly abandoning the team after chasing the basket too slow. She also overhears Lollipop writing eulogies for her. At the end of the episode, Book and Lollipop, along with some other teammates, scold Taco for not helping during the challenge.
In "Today's Very Special Episode", Book says Taco wouldn't need to be killed to be deceased in her eyes, Lollipop agrees. This makes Taco yell, "What the heck, was it really that bad!?"
In "Fortunate Ben", Book glares angrily at Taco while entering the team's plane, which makes Taco nervous.
In "Four Goes Too Far", while latching onto Golf Ball's rocket, Taco jumps back down to Earth to find a way to get rid of the Twinkle. Book and Lollipop both angrily groan after seeing that Taco left them again.
In "Get to the Top in 500 Steps", Book talks to Lollipop about who obviously won't be running the stairs, but Lollipop gets fed up with Book's attitude towards Taco and acts as if Book has tried actually talking to her.
In "What Do You Think of Roleplay?", Book can be seen angrily eyeing "Taco" just before the contest starts. Lollipop, no longer annoyed at Taco and realizing she abandoned her team for good doings, asks Taco for a strategy to find out who the impostor may be. Book gets mad at Lollipop and questions why they should listen to Taco. Lollipop explains what happened about Taco leaving the team in BFB 6, but Book still doesn't believe it, and asks how she knows Taco won't abandon the team again. Later in the episode, Book assumes Lollipop of being the fake for "acting so out of character", but she guesses wrong. After being called safe, Book realizes Taco outside of her team's now non-existent room, claiming she was right about Taco abandoning them and spazzes out from pure anger. Taco just looks down upset over the accusation.
In "Return of the Rocket Ship", Lollipop becomes more uncaring of Book's animosity towards Taco. During the challenge, while Book still rambles about her obsession about trying to prove that Taco is a traitor, Lollipop says "Looks like it's time to get this book's cover... judged!"
Book spends the entire episode spying on Taco, saying that Taco isn't helping by just sitting by herself trying to ignore everyone, and claiming Taco abandoned their team.
Taco states that Lollipop is a mutual friend who she doesn't even like that much at the moment. She then spends the rest of the episode sitting by herself, ignoring her team.
In "Getting Teardrop to Talk", when Book complains over Ice Cube and Teardrop dying in their chase for the basket, Taco keeps telling her to keep running. When Taco hears that Book exploded into flames, she responds, saying "Got it".
In "Enter the Exit", Lollipop watches Bell yell at Taco because she used her to get the Twinkle off the Moon.
Episodes suggesting a friendship
In "Why Would You Do This on a Swingset", Book and Lollipop are both sad about Taco's "death". Lollipop even writes eulogies dedicated to Taco, calling her "amalgamated and weird" which makes Taco angry and "bold and courageous" which makes Taco act prideful.
When Book realizes that Taco was recovered at the same time both she and Ice Cube were, that would mean she's still alive. Taco gets happy when Book figures this out. Book then ultimately comes to the conclusion that Taco abandoned them and seems to be genuinely sad about it. Taco becomes sad as well and desperately tries to tell Book she's right there with them.
In "Four Goes Too Far", Book, Saw, and Lollipop had a friendly conversation about space.
Continuing from Return of the Rocket Ship, despite Book and Lollipop arguing in the episode prior, Book tries to show off to Lollipop at the fact that Taco is avoiding her.