Box

A new aspect of her personality has developed in "Fan the Flames", where she ends up getting blurry vision and the lack of instinct, almost potentially injuring Bonesaw, proving that because of her long-term isolation, she often has trouble knowing what to do and is incompetent to the dangers surrounding her. She does also refuses to talk to anyone about her incompetence given what she almost did to hurt someone, with the given instance of Bonesaw while he was rock-climbing. The only one in her team in Go Big or Be Last to find out about her incompetence and struggle to take initiative was Lifering, giving her advice and lending a notebook and a pen for her to communicate through writing words and sentences in case she refuses to speak as for now.

With the new notebook Lifering gave to her in the aforementioned episode, she uses it as an opportunity to display a more strategic and deliberate side of her as shown in "All Play and No Work". Aside from her notebook as a diary, expressing her thoughts personally, her diary serves as a strategic tool for the team, navigating places where they search for one of the ghosts' keys. Much like Lifering, who emphasizes on trying to save others, she also displays a compassionate and helpful side when helping out the Cherries with their "injury".

During "Objects in Mirror", Box's true personality was shown. She is on the shy side, to the point where MePhone referred to her as "meekish" in her audition. Box also represses her feelings, leading to her having "everything packed" inside. She claims she does this since it allows her to "always know where everything is", and that expressing her feelings could cause things to get messy. Box is shown to be desensitized to death and the afterlife, remarking how she's been in the afterlife for a while, and shrugging off the claim that everyone had died, asking how they died immediately after. She gets noticeably upset at mainly MePhone4, but also Suitcase, and the other competitors having her corpse on the show, claiming that they were "doing it as a bit." Box also seemed to have trust issues, as she is both quick to apologize and mostly lays low. Outside of her general personality, she also has a sense of humor not everybody can understand; containing sarcasm and deadpanning. Box became aware that MePhone created the contestants before everybody else. She never learned to swim, which lead to her death. Overall, Box is a meekish character, that occasionally takes initiative.

Trophy was the only character to call out the cardboard material's lifelessness, prompting everyone else to defend the inanimate object. Despite that animosity, both teamed up in "The Participation Trophy" where it was also revealed Box idolizes Trophy and "mimics his exercise regimen", using it to swiftly (offscreen to the viewers) navigate the kiddie pool obstacle course, earning Trophy's respect despite both of them also losing to Team Cinnamonfinity.

In Inanimate Insanity II pre-finale and Inanimate Insanity Invitational, Box was not shown to have a personality, since she was not alive. Despite this, other contestants treated Box as if she was sentient, often speaking to and for her or seeing her silence as shy, wise, emotional or rude depending on the situation. In Inanimate Insanity Invitational, Box was seen by Nickel and Balloon as a backstabber since she accidentally voted for them after supposedly allying with them. These completely coincidental incidents made her a powerful ally in Tea Kettle's eyes. It was also seen through the subtitles of some episodes that Box did have a voice, although it was unheard of in the videos. It was inferred by the rest of the cast that Box could talk.