Zero (Zro) is a blunt, bossy normal build (body) Algebralien with messy neck long light gray hair, pale gray skin, and black pupils eyes that rarely hide his emotions. He usually wears a blue-and-yellow cap, an oversized blue jacket with bright yellow accents, and casual clothes that match his laid-back appearance. Despite looking approachable, Zero is known for his short temper and no-nonsense attitude. He often takes charge when everyone else is arguing or wasting time, preferring to solve problems himself rather than watch everything fall apart. Although he can come across as controlling, rude, or impatient, he's surprisingly responsible and dependable, often becoming the group's unwilling leader. Beneath his serious exterior, however, Zero embarrasses incredibly easily and has a silly side he desperately tries to hide—much to the amusement of his clones. He lives in a bunker with his siblings ?/ clones, Zero 2, Zero 3, Zero 4, and Zero 5, whose personalities are almost the complete opposite of his. They constantly tease him, especially by bringing up old embarrassing tapes or awkward moments, which never fails to make him flustered. While Zero acts like they annoy him to no end, he secretly cares deeply about them and would do anything to keep them safe.

0.2–0.5 are easygoing, playful, and somewhat mischievous who enjoy teasing each other—especially the original Zero. Unlike him, they rarely take things too seriously and often go along with whatever sounds the most fun. They can be a little lazy, sarcastic, and dramatic, but they're also loyal and genuinely care about one another. While they occasionally annoy Zero on purpose, they're quick to help when someone is in trouble. pale gray skin, , and nearly identical appearances, with only small differences between each clone.

0.2–0.5 are easygoing, playful, and somewhat mischievous who enjoy teasing each other—especially the original Zero. Unlike him, they rarely take things too seriously and often go along with whatever sounds the most fun. They can be a little lazy, sarcastic, and dramatic, but they're also loyal and genuinely care about one another. While they occasionally annoy Zero on purpose, they're quick to help when someone is in trouble. pale gray skin, , and nearly identical appearances, with only small differences between each clone.

0.2–0.5are easygoing, playful, and somewhat mischievous who enjoy teasing each other—especially the original Zero. Unlike him, they rarely take things too seriously and often go along with whatever sounds the most fun. They can be a little lazy, sarcastic, and dramatic, but they're also loyal and genuinely care about one another. While they occasionally annoy Zero on purpose, they're quick to help when someone is in trouble. palw gray skin, and nearly identical appearances, with only small differences between each clone.

Fifteen is a fierce, hot-tempered Algebralien who values her independence and hates being disturbed. She's blunt, intimidating, and protective of the few people she trusts. Dark red body Red- shoulder long hair, sharp eyes, dark brown ushanka. (Love-hate relationship with Zero.) She wears a green camouflage jacket with a fluffy fur collar over a black tank top, brown cargo pants with fingerless gloves