Zero is an Algebralien -He wears a blue and yellow cap which reads "eiπ + 1" -Like the other zeros, Zero originally was simply in the background of the sub specials as a prop in the sub count. In "Thanks for 1,500,000 Subscribers!", he makes his speaking debut. Here and in "Thanks for 2,000,000 Subscribers!" he is shown to take an assertive role, such as telling the other numbers to instead write the sub-count from now on, and reminding them when it was not updated. In "Thanks for 2,763,000 Subscribers!", Zero retains many of these traits, being seen taking 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 - when the other Zeroes watch his embarrassing tapes, Zero is barely able to fight back; it is only because he was forced inside a fridge, and that when his tapes are stolen, he breaks out of the fridge with pure anger, yelling "STOP LAUGHING AT ME!" and takes action by destroying the TV. He most likely picks on the other Zeroes due to him projecting his insecurities and embarrassment on them. Zero is also shown to have a silly side, with him dancing before Six appears in the vent. Zero has a softer side, however, as he apologises to one of the other Zeroes after accidentally throwing scalding coffee in their face, saying he would never hurt them on purpose (though he then accidentally smacks them in the face). This shows that Zero does not intentionally mistreat others, but does so out of obliviousness. None of the other Algebraliens seems to particularly enjoy the presence of Zero, as even Two Thousand, Seven Hundred, Sixty-Three rejects and belittles him. However, he seems to have a positive relationship with Fifteen, as she lets him into her cabin after Fourteen chased him. Ten also states that he would miss the zeros, so this could imply a positive relationship with Zero. In "Homeward Bound!", Zero is shown to mock Tennis Ball for being clumsy. -has four other siblings/clones, leader of them -puppy boy -transgender male -he/they -has a massive crush on Fifteen -Fifteen is his girlfriend -has female parts -lives in fifteens cabin along with his four siblings -Zero3 speaks in a calm, flat voice, while Zero5 speaks in a goofy, cartoonish voice. Zero5 speaks with a cheerful, excited voice, and Zero4 a more pathetic, whiny voice