(He/Him) Zero, is an Arabic numeral zero. He has a gray body and slightly lighter gray limbs. He wears a blue and yellow cap. Zero takes control of all the other Zeroes, telling them what to do and berating them if they don't follow. He seems to bully the other Zeroes frequently. Despite this controlling attitude, he is easily embarrassed! Neutral with everyone.

One is an Algebralien and an antagonist in BFDI. She was the main antagonist but now is very confused about what’s going on, after escaping her prison she emerges from the damaged Moon, which she was trapped in by Four and the other Algebraliens after she killed (not really killed) Three in 2009. Enemies with everyone. (She/her) (?)

Two is a happy, carefree person, that may come off as rude occasionally. They seem to appreciate nature and has never been known to do something evil, They are also somewhat lazy. Friends with everyone but One They/Them (?)

Three is friendly and caring. She constantly does good deeds for those around her! However, she is also impulsive and bad at keeping promises. Friends with everyone! (She/her)

Four is a very… strange number, with being able to mutilate, revive, screech, shoot energy beams from his hands. Friends with X Enemies with Two, One. (He/Him) (?)

Six is irritable but also smart (?). They are also quite friendly when interacting with Nine (Idk what to write) (They/Them) (?)

Nine's personality is based upon the exaggeration of the skater culture, and uses slang such as "tubular", having sunglasses, and owning a skateboard. As a result of this, Nine acts like they are very cool. Nine also appears to get sensitive at times, as they cry after Six says that they have no "style". (They/Them) (?)

Ten is a passionate algebralien who is very friendly to their fellow Algebraliens. They seem to enjoy the taste of key lime pie and watching TV. Ten often helps out others! (He/Him) (?)

Twenty-Seven is the Arabic numeral, with their negative form being a muted purple. This is a result of the Negative Infection. (Infected) (Idk what gender)

Fifty-Five is the Arabic numeral fifty-five (55). When they were turned negative, their eyes turn black and their body color becomes inverted. (Idk what gender) (Infected)