Four is a blue Arabic numeral four (4) Integer Algebralien, in the form of "4" but with an open top. His limbs are more of a lighter colour of blue with four fingers like every other Algebralien. Has somewhat soft texture. Four is an intelligent, thoughtful and somewhat friendly Algebralien. Though often times he's menacing and quite a little unhinged, he's often protective of other Algebraliens regardless if they're close to him or not. He's protective of almost everything, almost. Other Algebraliens also cower behind him due to this, no matter if the Algebralien was a bigger number than him. Outside of being a little unhinged and having a frequent tendency to step up and be responsible as no other Algebralien would, Four loves Math a lot! Four and Five DESPISE eachother. He doesn't quite like Two either. Likes juice boxes. He screeches when experiencing intense emotions.

X is a yellow Latin letter X Variable Algebralien with lighter yellow limbs with four fingers, even though his appearance is more like the Latin letter he's actually the Multiplication variable. He has a squeaky/stress ball-like texture. X is much friendlier and softer than Four, his best friend. He is social and at times a little ignorant. Often unable to "read the room", though he mostly stays by Four, his best friend's side loyally. X avoids situations that inevitably result into pressure pressed on him by hiding behind Four expecting him to handle it instead, he gets way too nervous in scenarios such as that. Loves baskets and listening to Daft Punk. Also likes juice boxes.

Two is a green Arabic numeral two (2) British-accent Algebralien Integer, with lighter green limbs and four fingers like every Algebralien Two is Easygoing, silly and carefree. They may come off as rude at times, and has never been known to do any intentional evil. They may often leave or act unbothered whenever something negative happens. They're seen either in their own world or trying to befriend Four who is somewhat disinterested in that, seeing Four and X as "Friends who I don't have a bad history with", and Four's the only Algebralien who "actually despised" them, which may have been a foreign concept for them to grasp

Three is a light red Arabic numeral three (3) Algebralien Integer with limbs colored reddish-white and four fingers like every Algebralien. She has a brick-like texture. Three is friendly and caring with a habit of being way too observant, she's often going around looking for things she could help in anyway with. However, at times she may be impulsive and horrible at keeping promises. She's mostly seen with Five playing Toss the Ball with a red and orange gradient ball she carries around wherever she goes. Or trying to help in anyway she could. Loves Science a lot.

Six is an azure colored Arabic numeral six "6" Algebralien Integer, he has a water blue color body with sky blue limbs with four fingers like every other Algebralien. Texture of a plush doll. Six is a sarcastic jokester artist, rarely ever concerned about any situation no matter how bad or serious it got as she never ever bothers takes part in any of them. Though she's sometimes somewhat antagonistic towards Seven.

Five is a purple Arabic numeral five "5" Algebralien Integer. He has a purple body and dry lilac limbs. He has four fingers like every other Algebralien. Possibly has a brick texture. Five is very irritable and a stickler for rules, often annoyed specifically by Six. Sometimes being no-nonsense and unable to draw the line of difference between a sarcastic joke and actual sentences, besides his snarkiness, he does genuinely care about his best friend, Three. Five and Four DESPISE eachother. He's shown either playing Toss the Ball with Three or being annoyed by the lack of seriousness of half the Algebraliens in the Equation Playground or any other planet.

Seven black Arabic numeral seven "7" Algebralien Integer with dim gray colored limbs and four fingers like every Algebralien, and is possibly the lightest weighing Algebralien. Having the same texture consistency as a plushie. Seven is a social, composed, and fun-loving Algebralien who enjoys listening to music especially when he has nothing else to do and is free, he seems to be quite unlucky. Ironic given he's literally the number seven given physical form, which is known to be a lucky number. He has a tendency to casually describe recent events in a cheerful manner, regardless of how negative they are. He likes bass music and eating chess pawns.

Eight is a grey Arabic numeral eight "8" Algebralien Integer without any holes, with lighter grey limbs. Having four fingers just like every Algebralien. Texture/Made of pure lead. Eight, unlike every other Algebralien. Seems to exhibit a lot less emotion. He speaks in a deadpan tone and is rather aloof, being indifferent about everything regardless of the situation. Often reacting in a tired manner to most inconveniences. However, he's also easy to get along with and is mature and quite reasonable. Watches Object Show 87, hangs out often in the Even Numbers club. A group of even numbered Algebraliens.