These article lists the relationships between Price Tag and other characters.
Price Tag is a mischievous & cheeky yet friendly and sociable contestant.
Status: Likely friends
In "The Worst Day of Black Hole's Life", when Fanny says she hates cake, Price Tag reassures Cake that she was talking about the food, but Cake says he knows that. Later, they try to stop Tree from stealing their team's blocks. Price Tag suggests they defend their stack but immediately leaves to follow Pillow, upsetting Cake.
In "You Know Those Buttons Don't Do Anything, Right?", Price Tag finds Just Not, and thinks they're cool so they want to join. Naily thinks they're pretty cool as well, and asks them if they can make a specific face (>:3), so they make the face, and Naily lets them in. They also do a teasing mischievous face (>:D) along with Naily after telling Basketball that their team is taking the elevator, not the stairs.
Status: Best friends
In "You Know Those Buttons Don't Do Anything, Right?", Pie asks Just Not if they are dying. After she finds out that they aren't dying, she leaves. Frustrated, Price Tag then yells "Hey, get back here!"
In "The Worst Day of Black Hole's Life", Price Tag asks to tag along with Pillow, and she allows them to. They investigate the puddle of battery acid and push objects into it. Pillow eventually puts Price Tag in it, killing them.
Status: Minor enemies
In "You Know Those Buttons Don't Do Anything, Right?", Price Tag angrily asks "What?" when Two asks them and Winner to move make Nonexisty "bigger". When they get to join, Two asks if they do equal 1 and Price Tag responds "I can if you want me to!" and shows a $1.
In "You Know Those Buttons Don't Do Anything, Right?", when Price Tag is chosen to be picked as the second debuting contestant for TPOT, they say that they "take back all the things they said about Winner," suggesting they heavily insulted Winner offscreen while they were temporarily eliminated.
Status: Former enemies, on Price Tag's side
In "You Know Those Buttons Don't Do Anything, Right?", when Price Tag makes themselves equal one, many of the contestants give off different reactions with some looking mildly curious, impressed, shocked, or concerned.