Bossy and Controlling: Zero is assertive and frequently takes charge of the other Zero clones. He is seen directing them on what to do and will quickly berate or pick on them if they fail to follow his orders.Insecure and Easily Embarrassed: Despite his tough exterior, Zero is incredibly self-conscious. When the other clones find and watch his embarrassing tapes, he gets flustered, trapped in a fridge, and eventually flies into a blind, screaming rage ("STOP LAUGHING AT ME!") to destroy the TV. His bullying behavior toward other zeroes is heavily implied to be a projection of his own deep insecurities.Oblivious but Well-Meaning: He does not intentionally mean to cause severe harm. For example, after accidentally spilling scalding coffee on a clone, he is quick to genuinely apologize and state he would never hurt them on purpose—only to immediately and accidentally smack them in the face right after.Silly and Expressive: Zero has an eccentric, lighthearted side, occasionally breaking out into spontaneous dances when he thinks no one is looking (such as before Six appears).

Six is a bright, azure-blue Arabic numeral "6".They are canonically genderless like most Algebraliens, but they are voiced by a female voice actor and often use she/they or they/them pronouns.They are one of the few characters in the universe confirmed to have a pet—specifically a black cat with white facial features.)Personality and LoreIntelligent and Creative: Six is an artist and a painter. In the lore book The Number Playground Chronicle, they were even credited as a business cover designer