Eachother's first relationship in TPOT, and the strongest/healthiest for both of them. Was the first time Price Tag got to open up to someone, and for book, it represented her change, or atleast her strive for such after BFDIA and BFB. Notably, their friendship is kickstarted in TPOT 10, the same episode where Book directly mentions Gaty, along with having her nightmare highly related to that time in her life. Book & Gaty: Former friends, now soured. Gaty in BFB says Book 'used to' be one of her most levelheaded friends, but as the tacobook drama engulfed their whole team, Gaty rightfully cut Book out, but not before giving her a dramatic talking to in BFB 13. Even as Book changes on the surface as BFB splits, Gaty still doesn't want anything to do with her, telling her to "Find some new friends to be better AT." Book still thinks about her, notably in TPOT 10 as she assumes Gaty will be one of her old friends she needs to confront. Two & Gaty (this is the shortest one as i am the least familiar with their relationship. if any twogatyers wanna jump in with how they're amazing for eachother that would be appreciated /silly) Two's first real connection to someone... ever? Their friendship is core to their character, as Two becomes generally nicer after getting to know her, and shows off Gaty's best aspects. Price Tag & Two: Price Tag is the first person Two talks to after their year long depression (thanks to Gaty's erasure) Ever. Not only that though, but they do immediately break through to eachother, as Price Tag channels back into their comforting side as seen in TPOT 10, proving that their interaction with Book wasn't a fluke, but a core part about how they interact with people. This comes back to the point that they're someone who Can help others, and that's a character trait that they can use to know others better, which is their issue they get at with their conversation with Two. Both of them have struggled to connect with others and find their place, yet are able to confide in eachother.