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"I don't think I've seen Twelve (character) before!"Four
This page is about the character(s). For the episode, see Twelve (episode).


— Twelve

Twelve, or 12, is a Numberblock made of 12 blocks.


Twelve is made of 10 white blocks and 2 orange blocks. She has thin, red eyebrows, rectangular eyes, pink lips, and red legs with red trousers. Her left arm features a rectangular white and orange watch referred to as an "array display". Twelve is able to project holograms of various rectangular arrangements or "arrays" via its screen.


Twelve is a composed super-rectangle often seen practicing her yoga abilities. She holds her title with pride and confidence, often announcing her status as a super-rectangle to others, being naturally extroverted and extravagant with introductions. Despite this, Twelve is very supportive of her friends, often quick to indirectly guide others into finding a solution to their problems, rather than directly interfering and giving answers herself. Holding more calm and rational thoughts than others, Twelve commonly leads and advises other Numberblocks, frequently looking out for their well-being. Her support and patience, however, occasionally grows weary, sometimes expressing concern and confusion to those more energetic and impulsive.

Despite her serenity and leadership mindset, she is also shown to encourage more rowdy situations herself, even participating gleefully with others. Twelve is also displayed to have a sense of heroism, willingly rushing through risky situations to assist others.

Aside from practicing her unique abilities, Twelve also frequently meditates and practices yoga. She tends to gravitate naturally towards organizing objects in columns and rows.

She can control clocks using her hands and her mind and rays too!

Episode Appearances


Because of Twelve's array display, she can make different rectangular arrays: vertical, 2x6, 3x4, 4x3, 6x2, or horizontal. She can also make a bunch of other shapes.

2D (81/505,861)

3D (1)



  • Twelve is first female Numberblock who is a multiple of 4.
  • She is the first number to be a super rectangle.
  • Twelve is the first number voiced by Emma Tate. Her voice actor also voices 19 and 21.
  • In About Time, it has shown that Twelve has telekinesis.
  • 12's numeral means:
    • 5 in Ternary.
    • 6 in Quaternary.
    • 8 in Senary.
    • 10 in Octal.
    • 14 in Duodecimal.
      • In the duodecimal system, 12's numeral is 10.
    • 18 in Hexadecimal.
      • In the hexadecimal system, 12's numeral is C.
  • Twelve commonly utilizes her array display to project holograms of her various rectangular arrangements, such as 3 by 4.
    • She typically announces "Switch!" or "Turn!" when altering her arrangement.