Pillow can be patronizing and condescending to others, usually when it comes to her research. She occasionally will act either angry or very odd around other characters regardless of how they'll react to it. Despite this, she has her nice moments and has been shown to have a self-sacrificial side as seen in BFB 4, showing she may care for her teammates.
Status: Minor enemies
She, Pie, and Black Hole talk about what Liy can do as a light switch in "Fortunate Ben".
In "Getting Teardrop to Talk", while Eggy and Lollipop are talking about this "arm-fluttery" thing that Teardrop is doing, Pillow comes in and suggests that Teardrop is fluttering her arms because she doesn't care at all. Eggy believes this.
In "Today's Very Special Episode", Pillow and the rest of her team block the forks from hitting Four in fear of getting the zappies.
In "Fortunate Ben", when Pillow reads her fortune and calls it odd, Four says she's odd, which makes her upset.
In "Return of the Rocket Ship", Pillow says that Four's challenge was predictable. Because of that, Four catches Pillow with his tongue, screeches, and then swallows her.
In "Getting Teardrop to Talk", while Eggy and Lollipop are talking about this "arm-fluttery" thing that Teardrop is doing, Pillow comes in and suggests that Teardrop is fluttering her arms because she doesn't care at all. Lollipop is then convinced that Teardrop's standards are "through the roof".
In "Enter the Exit", Pillow licked Lollipop because of her hunger.
Status: Minor friends
In "Today's Very Special Episode", when Pillow says that she'll block all of the forks from hitting Four, Pen tries to talk her out of it by saying that it only takes one person to get Black Hole, but Pillow says if one person leaves, the rest will die.
In "This Episode Is About Basketball", Pillow gives a sarcastic "fantastic" to Pen when he throws some balls into Black Hole. They later work together to get balls in the baskets before they lose.
When Pie asks what Liy was a switch for, Pillow tells her she can do a lot more than what's expected out of a light switch.
In "Today's Very Special Episode", they both block the forks from hitting Four. Pillow later tells her and the rest of the team to get Black Hole while she blocks all of the forks herself.
In "Today's Very Special Episode", when Pillow says that she'll block all of the forks by herself, Tree is surprised by this, but gets annoyed when Pillow keeps interrupting him by telling them to go.
In "This Episode Is About Basketball", Pillow angrily tells Tree to pull his weight in the contest when he isn't throwing.
In "Getting Teardrop to Talk", when Four asks if the eight teams are all set to go, Saw, Teardrop, and Book try to tell Four that their team isn't ready because of their team name, but since all three of them are fluttering their arms, Pillow says that the teams are all set.