Eraser at first usually acted unamused or impatient with almost anyone who wasn't a close friend of his and was often uncaring. In BFB however, he appears to be less grumpy and is more social and outgoing, similar to Pen.
Eraser is the first person to meet the Announcer, who randomly falls from the sky and tells him he's in luck, because they're building the island of luxury called "Dream Island" which includes a 5 star hotel, 6 restaurants, robot servants, a casino, and the winner gets to decide who gets to come and who doesn't. Then Eraser asked how much the island cost, and the Announcer responded "not even a penny".
Eraser wanted to take the island for himself, but the Announcer didn't allow him because other people would want to win it to, and thus the Battle for Dream Island begun.In "Barriers and Pitfalls", when the Announcer says he has to tell the Cherries one more thing before the contest starts, Eraser says "Boooooooooooorrrrrrrring".
In "Sweet Tooth", when the Announcer gives his cake a seven, Eraser gets mad.
In "Cycle of Life", when the Announcer says that the winners get a prize, when Eraser says "Which is?", the Announcer says he'll find out later, which makes Eraser angry.
In "Insectophobe's Nightmare", when the Announcer is just about to explain the ninth contest, Eraser says "Which is?" which makes the Announcer look at Eraser silently, Eraser frowns.
In "A Leg Up in the Race", Eraser is knocked off his ladder by a water balloon the Announcer dropped.
In "Don't Lose Your Marbles", when Eraser what the contest is, the Announcer says that he's IMP, which makes Eraser angry. When he loses 10 points for turning in a maroon ball, he says "maroon and red are the same!". He tells Pen that the "dumb speaker box" didn't like his ball. Eraser ends up turning in his ball last.
In "The Glistening", when the Announcer says that he and Pen only got 2 to the fifth votes, Eraser angrily says "Which is!".
In "Return of the Hang Glider", Eraser screams when the Announcer says that he sold Dream Island. He then tells the Announcer that he can't just sell Dream Island.
In "Today's Very Special Episode", Eraser asks Bell what her string is attached to, when she says she'd rather not tell and that it's none of his business, Eraser says he's gonna find out and climbs it.
In "Return of the Rocket Ship", Eraser and Fries try to show Bell that based on what they know, at any moment Four and X were gonna announce the contest, starting with X floating.
In "Getting Teardrop to Talk", Eraser (and all the other characters) start to get sucked into Black Hole, but are saved by Four.
- Main article: Blocky, Eraser and Pen
Status: Best friends
In "Yeah, Who? I Wanna Know", Eraser snatches the BFDI Game Rules from her, saying "Gimme that!"
In "Bridge Crossing", Eraser pushes Bubble onto the bridge to cross it, which makes her mad.
In "Cycle of Life", Eraser blames Bubble for their team losing.
In "Insectophobe's Nightmare", when Bubble points out that they're winning, Eraser says "Yeah, sure Bubble".
In "Crybaby!", Eraser is mad at Bubble for almost losing them the last episode's challenge and tells her not to do that again.
Status: Minor enemies
In "Sweet Tooth", Eraser asks Pen if Coiny is a penny since they need 1 cent to purchase their cakes.
In "Reveal Novum", Coiny is frustrated by Eraser's complacency regarding the underwater TLC. Eraser says they could just push the emergency button and be saved. Coiny tells him there isn't one, shocking Eraser.
In "Power of Three", Pen, Eraser, and Firey make up a team. When Firey dies during the challenge, they have to restart in order to revive him. When Firey is brought back, Eraser tells him not to fall again. Later they win the challenge and all receive Win Tokens.
In "Don't Lose Your Marbles", Eraser grabs Firey to prove that the ball he turned in is red because it's to dark to tell.
Status: Very minor friends
In "Take the Plunge: Part 2", when Flower turns to Snowball to tell him to beat up Bubble, she hits Eraser out of the way.
In "Sweet Tooth", Flower gives Eraser's cake a 10/10, which Eraser is happy about.
In "Enter the Exit", Eraser is happy to see Foldy back. When she asks where Stapy is, Eraser shows her the footage of Match ratting their team out.
In "What Do You Think of Roleplay?", Eraser finds out that Foldy is a pentagon and screams, he ends up happy when Ruby unfolds her since she's now the shape of a rectangle. When Foldy asks how she can trust Fries if he can't fold paper correctly, Eraser says she's right. Later after they are safe, Eraser tries to tell Fries not to fold her back or she'll become a pentagon again.
Out of all 64 contestants, Eraser is the one who asks Four what the prize of the contest is. Later, Eraser asks if it's time to start the first contest when Four starts to stand still doing nothing.
In "Today's Very Special Episode", he runs to Four saying there ready to show their makeover. Four ends up loving what they did so much that he screeches hearts at the team, one of which hit Eraser.
In "Get to the Top in 500 Steps", Eraser asks what the contest is.
In "Return of the Rocket Ship", Eraser and Fries had gotten to know Four and X so well that they both anticipated exactly what the two hosts would both do, based on previous episodes, before announcing the contest.
In "What Do You Think of Roleplay?", Eraser tells Fries to stop folding Foldy or else she'll become a pentagon again. When Fries says there are many things wrong with what he said, Eraser looks away sadly.
In "Return of the Rocket Ship", Eraser says that Fries is right about Four and X getting ready to start the contest based on their blank staring, followed by X floating. They both wait patiently with Bell for this to happen and are shocked when X does the opposite and goes underground.
In "Lofty", Eraser chooses Rocky for his team over Golf Ball because she's a bossy bot.
However, in "Return of the Hang Glider" and onward they seem to no longer be enemies and are neutral. She scolds Eraser and Pin in that episode when they literally rip off Leafy's skin.
In "Yeah, Who? I Wanna Know", Golf Ball asks Eraser if there are anymore rules.
Status: Minor acquaintances
Eraser pushes the Ice Cube Recovery Center to the edge of a cliff, as part of Blocky's prank, making Eraser indirectly responsible for Ice Cube dying nearly 70 times in "Cycle of Life" and "Insectophobe's Nightmare".
In "The Glistening", he votes Ice Cube to be eliminated because of how unbearable the heat in the TLC is.
In "Lofty", Eraser and Snowball try to pop Leafy's balloon. Leafy later pops Erasers by hugging it.
In "Half a Loaf Is Better Than None", Eraser attempts to cut his arms off to gain some sympathy points, but Leafy stops him.
In "Vomitaco", when Leafy says that she hopes Ice Cube doesn't get eliminated, Eraser says "Yeah, yeah, blah blah, whatever".
In "Return of the Hang Glider", Eraser votes for Leafy to win. Eraser tells Leafy that Firey deserves Dream Island. When Leafy starts to switch between herself and Evil Leafy, Eraser says that Leafy's turning evil. Eraser is the one who ultimately tries to execute Leafy forever for stealing Dream Island.
Status: Minor enemies
In "The Escape from Four", he is shown to idolize Loser like almost everyone else.
They haven't interacted directly but are assumed to be friends since they are on the same team.
In "Puzzling Mysteries", He later overhears her and Pencil talking about the time he stepped on a nail and says you two better not be talking about me and then asks why they aren't helping on the puzzle. Match accused Eraser of being bossy like Pin.
In "Crybaby!", Match points out that Eraser isn't crying and Eraser says crying is for wimps.
In "Don't Lose Your Marbles", Match called Eraser "IMP" and Eraser didn't look happy about it.
In "Return of the Hang Glider", Eraser slapped Match because she voted for Bubble to win instead of Leafy, setting her ablaze.
In "Questions Answered", when Match brags about her team being safe, Marker and Eraser can be seen looking at her.
Status: Minor enemies
In "Return of the Hang Glider", Eraser slaps Needle for voting Firey to win.
Status: Minor enemies
- Main article: Eraser and Pen
Status: Best friends
In "Puzzling Mysteries", when Pencil says she think they're doing the puzzle wrong, Eraser tells her that she worries to much. He later overhears her and Match talking about the time he stepped on a nail and says you two better not be talking about me and asks why they aren't helping with the puzzle.
In "Lofty", he got angry at Snowball for popping Pencil's balloon, this is only because they are on the same team.
In "Return of the Hang Glider", Eraser almost slaps her for voting Bubble to win over Leafy.
In "Power of Three", when Pin is eliminated, Eraser says, "That Pin got what she deserved."
In "Return of the Hang Glider," Eraser and Pin rip off Leafy's skin together.
They haven't been seen interacting but are assumed to be friends since they are both on the same team.
In "Bridge Crossing", when Snowball disconnects the second bridge, Eraser says "Seriously".
In "Crybaby!", Eraser chooses to keep Snowball safe instead of Teardrop because Snowball is just "AWWWWESOME!"
In "Lofty", Eraser gets angry at Snowball after he popped Pencil's Balloon. Asking him "What was that for?!". Snowball says he popped it cause the balloons were pink and pink is to girly. Eraser disagrees, saying pink is quite manly.
In "Half a Loaf Is Better Than None", Eraser, Blocky, and Pen cheer for Snowball in the bread loaves contest.
In "Return of the Hang Glider", Eraser stands in a group with Blocky, Snowball, and Pen as they ask to enter Dream Island.
They have never interacted directly but are assumed to be friends since they were on the same team.
In "Questions Answered", Eraser seems to be confused about what Stapy is doing with the fake buzzer he's making.
Status: Possibly friends
In "Getting Teardrop to Talk", when Yellow Face says "Free food people!" after eating one of Fries' fries, Eraser runs up to him saying "Gimme, gimme, gimme!". When he reaches the team he asks what happened to the free food and is annoyed when Yellow Face just smiles and yells "Free Food!" again, thus naming their team. When Yellow Face tells Puffball to get the basket, Eraser can be seen looking at Yellow Face angrily, likely because he was tricked into joining the team by him.
In "This Episode Is About Basketball", Eraser says he's okay with X using a regular cake. When X read the votes backwards, Eraser says that was the best April Fools prank ever. When X tells him it was an accident, Eraser loses his smile.
In "Return of the Rocket Ship", Eraser and Fries had gotten to know Four and X so well that they both anticipated exactly what the two hosts would both do, based on previous episodes, before announcing the contest. They start off by waiting for X to mysteriously float, only to be shocked when he instead goes underground.
In "The Escape from Four", Eraser helps with trying to pull the eliminated contestants out of Four.