Four

Four, or 4, is the Numberblock made up of 4 green blocks. His favorite shape to be is a square. 9 is like a brother to him because 9 also likes to be a square. AKA four’s a square.

4 first appeared in the episode with the same name.

He is voiced by Marcel McCalla.

Absences

 * One, Another One, Two, Three, One, Two, Three!, Zero and Building Blocks 

Total number of appearances: 43

Family: Unnamed grandparents, Unknown parents, Unnamed sister -in-law ( deceased)

Friends: Other Numberblocks, numberjacks, alphablocks, Robot X ( Formerly) , Robot Y ( Formerly) , Robot Z (Formerly) , Mighty Eagle , Zeta

Enemies: Octonaughty ( Arch Enemy ), Terrible Twos , Terrible 20s , Other villains in Numberblocks, AV Bots , Internet trolls

Gender : Male

Likes: Squares

Dislikes: Round things, Circles.

0
Unknown.

1
4 & 1 had a great relationship. They are square Numberblocks.

2
4 & 2 had a great relationship. They were the only present male numbers who are in the first half of the first season. (Season 1)

3
4 & 3 had a great relationship. In "Four", 3 is upset that she wants to be the biggest Numberblock, but 4 thinks, "It doesn't matter who is the biggest."

5
4 & 5 had a great relationship.

6
4 & 6 had a great relationship.

7
4 & 7 had a great relationship.

8
4 & 8 had a great relationship.

9
4 & 9 had a great relationship. They are perfect square Numberblocks, they are like the square brothers, and they are best friends.

10
4 & 10 had a great relationship.

11
4 & 11 they spend with each other

12
4 & 12

Big Bad Square
The Big Bad Square is the alter-ego of Numberblock Four that appears in the episode "Three Little Pigs".

Costume Appearance
The Big Bad Square's costume is a wolf disguise consisting of ears, a nose, and a tail.

Biography
The Big Bad Square's role is the same as the Big Bad Wolf in the original Three Little Pigs story. He comes up to each house saying "Little pig, let me in!" Whenever a Numberblock 1, 2, or 3, denies by the hair on one's chin, Four says, "And I'll huff and I'll puff and I'll blow your house in!" So he blows down the houses and the Numberblocks out of the house.

As Three wonders where the pigs will live now, Four shows the pigs his house, which is green with four rooms, four square windows, four trees, and a number 4 on the door. The pigs now live with the Big Bad Square.

The Terrible Twos
The Terrible Twos are the evil twos; one wears a purple mask and the other wears a blue mask. They appear in The Terrible Twos, Peekaboo, Octoblock to the Rescue!, and Mirror, Mirror.

Trivia

 * Counting Sheep is the only episode in which 4 does not speak.
 * During the whole first part of Season 1, 4 is the only composite (and square) Numberblock.
 * 4 has a British Westcountry accent.
 * 4 makes all his arrangements throughout the series.
 * 4 has 5 arrangements that resemble Tetris bricks (tetrominoes)
 * Four has a pet.
 * As shown in Double Trouble, Octoblock to the Rescue!, and Eleven, Four hates round things.