This article lists the interactions and relationships of Black Hole.
Black Hole is a calm and collected individual, never raising his voice. Valuing life, he is empathetic and patient even to those who act rude towards him.
Because of his extremely laid back personality, he's never been shown to get angry or hold any hard feelings towards anyone, even when they are rude or mean to him.
In "What Do You Think of Roleplay?", Black Hole expects Bomby to thank him for saving his life twice, but instead Bomby angrily demands that Black Hole owes him a banana, since his first one was sucked into him. Black Hole says he doesn't owe him anything since he saved his life twice, but Bomby says life is cheap, so Black Hole assures him he'll get a banana.
In "Return of the Rocket Ship", Black Hole shows slight annoyance when he ends up sucking up the banana he just got for Bomby.
Black Hole and Bottle both joined the same team with the goal of preventing death.
In "Today's Very Special Episode", Black Hole says he'll suck up the forks when Pen and Bottle ask him if he can.
In "Getting Teardrop to Talk", Flower tells Black Hole to help her open a jar of cyanide. He acts hesitant at first, saying it would be a bad idea. Flower threatens to crush him, so he explains how that would be impossible as he is already infinitely small. Flower then yells for him to just do it, so Black Hole starts heading to earth to open it.
He also doesn't seem to mind how Flower kills Pie in "Get to the Top in 500 Steps", and is aware she would do it again if Pie were to pass her up the stairs.
In "Fortunate Ben", when Four tells the team to assemble or be dismembled, Black Hole says he has no limbs and wouldn't mind dismemberment. Four later obliterates Black Hole for flying in the contest.
In "Get to the Top in 500 Steps", Four threatens to obliterate the flyers if they participate in the contest, Black Hole included.
In "Return of the Rocket Ship", Black Hole tells Four to recover Pillow and Four says no because she isn't dead.
In "You Know Those Buttons Don't Do Anything, Right?", Black Hole learns that Four brought back the BFDI prize, but agrees that it isn't worth it to switch back to BFB since Four has proven to be too untrustworthy.
In "Fortunate Ben", when Pie asks what Liy was even a switch for, Black Hole says he thought she was just light switch.
In "Why Would You Do This on a Swingset", Pen is sucked up and killed by Black Hole when a fork hits him.
In "Today's Very Special Episode", Pen is about to ask something to Black Hole, but Tree interrupts him. Later, Black Hole says he'll suck up the forks when Pen and Bottle ask him if he can.
In "This Episode Is About Basketball", Pen tries to use Black Hole to win by throwing balls at him.
Black Hole is close friends with Pie as they both take preventing death very seriously.
In "Getting Teardrop to Talk", he wants Pie to teach him how to prevent death, so they team up.
In "Fortunate Ben", they discuss what they think Liy's switch does.
In "Get to the Top in 500 Steps", Black Hole swings Pie up to the top of the stairs so she can hit the button, making their team safe.
In "Fortunate Ben", the two talk with Pie about what they think Liy does as a light switch.
In "Return of the Rocket Ship", Black Hole is the only member of his team who cares at first about recovering Pillow.
Black Hole and Remote are shown to be really good friends in the later episodes.
In "Get to the Top in 500 Steps", he shows Remote how to prevent death while simultaneously winning for their team.
In "What Do You Think of Roleplay?", they are both seen together with Remote smiling at him.
In "Return of the Rocket Ship", Black Hole tries to get Remote to stop arm waving, but she isn't able to respond for some reason.
In "The Four is Lava", in response to Tree wanting to leave the inside of Four, Black Hole asks when was the last time they've seen Remote as happy as she is and claims the fun she's having is good for her.
In "Why Would You Do This on a Swingset", Tree asks Black Hole if he can spin their swing around, but Black Hole says that he can't push anything, but he can pull like there's no tomorrow. Black Hole pulls Death P.A.C.T.'s swing.
In "Today's Very Special Episode", when Tree asks Black Hole if he can draw, Black Hole says he can't but he can form an accretion disk.
In "Return of the Rocket Ship", Tree comes to the conclusion that if Pillow is dead, they should recover her. Black Hole agrees.
In "The Four is Lava", when Tree points out that they could've left Four's mouth a while ago, Black Hole simply states that they already found Pillow and could just take their time, along with also pointing out how happy Remote is.
In "You Know Those Buttons Don't Do Anything, Right?", when Tree says that they just took Pen in in BFB, Black Hole says that he remembers that. Later in the episode, Tree gets Black Hole’s attention by throwing a battery next to him. Black Hole looks up to see Tree motioning at him and figures the team must want him to fly up.
In "Return of the Rocket Ship", Black Hole expresses his disappointment with his team, which is supposed to prevent death, because they were headed towards the Evil Canyon's spikes, which would kill them, and forgot about Pillow being presumably killed. The entire team starts arm fluttering, meaning they don't care, much to Black Hole's shock.
In "The Four is Lava", Black Hole repeatedly swings Bottle, Pen, and Remote to Four's mouth so that they can have fun sticking their arms out.