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"We have to get the Fifteen (character) to stop!"Ones
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Uhh…. - Four
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"Lots of people mix Fifteen (character) up at first sight."Fifty-Six
This page is about the character(s). For the episode, see Fifteen (episode).

Hush, hush.
 

— Fifteen

Fifteen, or 15, is a Numberblock made of 15 blocks. She is voiced by Teresa Gallagher.

She is a Step Squad agent who secretly travels around Numberland completing missions.

Appearance[]

Fifteen is made of ten white blocks with a red border and five cyan blocks. Her usual block arrangement is a staircase, with her ten block shaped as steps and the five blue blocks on the right. She has bright pink lips and steel blue limbs with two boots; one is white with a red ridge, and the other is cyan. She wears a navy blue permanent mask with five steps on each end. This type of mask is used for other step squads, but with the amount of steps the step squad can make on each end and the colour of the Numberblock with the same amount of steps.

Her status as a Step Squad agent is derived from the number 15 being considered a triangular number-- the series of a continued summation of natural numbers.

Personality[]

As the first introduced Step Squad, Fifteen takes her role as a secret agent seriously. She is naturally introverted and shy. She holds her status to a very prideful degree, assuming the role of leadership frequently. Much of her mentality is straightforward and direct, revolving around completing missions in even casual scenarios. She performs her role both elegantly and gracefully, slinking around Numberland and concealing her presence. She assists other Numberblocks with her team, composed of One, Two, Three, Four, and Five with bizarre and extravagant plans. Despite her grace, Fifteen herself also mirrors this impulsive behaviour, often acting smugly above others and inducing other reckless and drawn-out solutions.

Fifteen is also shown to operate independently, usually keeping her team to herself and jumping directly into action rather than informing others first. Despite her reputation as a respectful leader, Fifteen's headstrong attitude has been shown to negatively impact others especially towards Thirteen. Her adjustment to recklessness prevents her from interfering with other negative situations. Still, Fifteen is often viewed to a higher, respectable degree by even other Numberblocks and is willing to jump into action quickly.

Episode Appearances[]

Total number of appearances: 39 + 1 (pictured)

She appears in 25.32% of all Numberblocks episodes, including the crossover specials.

Arrangements[]

Fifteen’s most common arrangement is 1R+2R+3R+4R+5.

2D (52/27,394,666)

Trivia[]

  • Fifteen is the third Numberblock numerically who is a multiple of 5.
  • Fifteen is the only odd composite number and triangular number ("step squad") between 11-20. She is also the only figured-out Numberblock (so far) whose divisors are all female.
  • Fifteen is the second character to “figure out” another character. She figured out 26.
  • Fifteen is the second composite odd number numerically. The first is 9.
    • She is also the smallest odd number to have 4 divisors.
  • Fifteen sounds similar to Alphablock C, due to them being voiced by Teresa Gallagher.
  • Fifteen is the smallest composite Numberblock to have a non-rectangular main arrangement ("step squad").
    • She is the second composite Numberblock numerically where her main arrangement is Vertical or Non-rectangular, the first is Ten, the third is Twenty-Two, fourth is Twenty-Six, the fifth is Twenty-Eight and so on.
  • Her mask subtly moves with her expressions.
  • She, 10, 25, 35 and 55 are all semiprimes with five as a factor.
  • She’s one less than a square (being 16), and claims to be a master of disguise (as seen in her title episode), meaning she could theoretically disguise herself as said square.
  • She is the third Numberblock numerically who's the same gender as both their digits, after 10 and 11.
  • She’s the first multiple of 5 numerically to not wear gloves, or to have star shaped eyes.
  • She’s the first female odd number to not be voiced by Beth Chalmers, followed by Nineteen, Twenty-One, Twenty-Five, and Twenty-Seven.
  • She is the third pentatope number so far in the series, after One and Five.
  • She is the first member of Step Squad Club to not have red limbs (instead having blue limbs).
  • Fifteen is the first Numberblock that was revealed to be an agent, but numerically the second, with the first being Thirteen, and the third being Twenty-Six.
  • As with 5's change in Series 5, her blue blocks changed to a more cyan-ish appearance. Her Numberling's numbers have also been changed to being slightly closer.
  • Fifteen is the fourth composite Numberblock to be the same gender as every Numberblock in her prime factorisation, after Four, Eight and Fourteen.
    • Fifteen is the first female to have that trait.

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