He has a yellow body and lighter yellow limbs. He is the tallest out of the current cast. I is a stern, parent-like figure to the lowercase variables in their home

R is a lowercase letter r. He has a purple body and lighter purple limbs as well as lidded eyes, with large, black pupils. R is a relaxed, slow-moving, and quiet variable.

T is a lowercase letter t. He has a blue body and lighter blue limbs. He is shown drawn backwards. T is an egocentric and bold variable.

They have an off black body and grey limbs as well as two pupils in both eyes. They wear two bracelets on each wrist and have a sizeable gap in their teeth which causes a lisp.

Q is depicted as a light purple lowercase q with lighter limbs. Wears a purple sweater with Q in the middle of it, it is implied they knitted it herself. She is the only one with eyelashes. Q was first presented as very shy and introverted. However, after noticing Soup, Q became more open-minded.

Soup is a Balinese cat, that has a leather color for his tail, paws, and center face, while merino is his major body color. He has a '3' mouth, with a tiny black dot as a nose. He got his name because, according to R, Soup is a "boneless lookin', kinda soupy guy”. Soup is R’s cat.

Square Root is the operator for Euler and Pi while also having a Rose Bud body and Your Pink limbs. Often tasked to watch over Euler and Pi to keep them in check.

Pi is a transcendental-irrational Pi symbol with a Moody blue body. Pi is mean and easily annoyed they don't like when people dont obey them and cares a bit of other people.

Euler is a transcendental-irrational euler symbol with a Downy body and Humming Bird limbs. They are identical to a variable lowercase e- as Euler's number uses an e for the symbol. They get overwhelmed and overthink a lot, trying to think about what other people are saying about them. At some extreme points they have meltdowns and could possibly explode.

Thirteen is a white colored numeral 13. They are shown to have various bruises on their body, most likely due to them being an unlucky number. They are also shown to often be in crutches and with a cast on their foot. Thirteen is a very unlucky algebralien, appearing constantly fatigued. They don't like to move around much. They have accepted their bad luck and is trying to live their life to the fullest.