One

One, or 1, is the small red Numberblock. She is the main protagonist.

1 first appears in the episode with the same name.

She is voiced by Beth Chalmers.

Family: Unnamed parents (deceased )

Friends : Other Numberblocks, numberjacks, Alphablocks , Numberblobs , Fluffies , 2 ( best friend) , Robot X ( Formerly) , Robot Y ( Formerly) , Robot Z (Formerly) , Mighty Eagle , Zeta

Enemies : Octonaughty (arch enemy), Terrible twos, Terrible 20s, Robot X, Robot Y, Robot Z, King monster the XVIII, The number Killer, The random guy, The masked Killer, AV Bots, Internet trolls

Gender: Female

Likes: Her best friend, hanging out with her friends, Finding ones of things

Dislikes: Being lonely

Appearance
1 has a small red cube body with an eye on the front and a mouth. She also has two arms and two legs and has a number 1 on top of her. She appears in almost all the episodes.

Personality
1 is sweet, curious, helpful, friendly, bubbly and clever. She loves finding things that are alone and normally calls them "one of something", while the other Numberblocks call something alone "a something" (e.g 1 would call one bee one bee while the other Numberblocks would call it a bee).

She sometimes feels sad since she only has one block, which means she can do fewer things than the others.

Episode Appearances

 * All except Building Blocks, The Way of the Rectangle, Twenty, Heist, Sign of the Times, Fun Times Fair and Divide and Drive

Total number of appearances: 83

Quotes

 * "1 wonderful world, and 1 me!"
 * "You're amazing!"

0
0 is after 1, and they have a nice relationship.

2
2 is the first number who 1 ever met who isn't a 1. They overall have a great relationship.

3
1 and 3 have a great relationship. 1 and 2 enjoyed 3's show, but sometimes, they can slightly be disappointed with her boastful personality, as shown in The Whole of Me.

4
1 and 4 have a nice relationship. They are square Numberblocks. In "Four", 4 paints 1 using squares.

5
1 and 5 have a nice relationship.

6
1 and 6 have a nice relationship.

7
1 and 7 have a nice relationship.

8
1 and 8 have a nice relationship. In "Double Trouble", 1 doubles up to 2, then to 4, and then to 8 in a doubling adventure, which leads to 8 splitting half by half down to eight 1's. Every time 9 sneezes out his middle block, he always splits into 8 and 1, which leads to 1 jumping back into 8's hole in the middle to combine into 9 again.

9
1 and 9 have a nice relationship. In The Three Threes, 9 splits into The Three Threes to open 1's honey jar.

10
1 and 10 have a fantastic relationship. When 10 was first introduced, 1 was surprised that 10 had a 1 on top. 1 was also pleased with 10 being a rocket.

Trivia

 * On Halloween 2017, a pumpkin was carved in the shape of Numberblock One.
 * 1 is the first Numberblock to not be made of other Numberblocks. The second being Zero.
 * This is because 1 fell from the sky as a small block until it turned into her.
 * There is a fanmade Numberblock posted on Twitter called "Zero point Five (0.5)" / Half (1/2) who resembles 1, but it is half 1's size and has no arms.
 * There is also a prototype design of Zero that heavily resembles 1, but it has an almost transparent block. This design was by Arifmetix.
 * 1 is the first Numberblock to ever be seen in the show.
 * 1 was originally white with black limbs and two eyes that resemble the eyes of Alphablock A or B from Alphablocks. Her Numberling was also in serif.
 * 1 is the first square number, cube number, triangle number, and polygonal number to appear.
 * 1 has the most copies shown at the same time, being 40, beating her previous record at 10 1's.
 * 1 is similar to the Pudding Monsters, due to them being small, red and are cyclopses. They also have the ability to become bigger characters by fusing.
 * In the Alphablocks episode UFO, An "Alphablock 1" appears during the episode. Some fans referred to it as a "Numberblock" and the term was eventually used for this show.
 * 1 is the first Numberblock to not be able to change her shape. The second being 0.
 * However, she can morph into 3D shapes, such as a frustum, as shown in "Hiccups".