X Finds Out His Value/Characters

Coverage
One is the character that was exhausted for the lucky number being Seven, along with Three.

Three
three its a number from x finds out his value

Coverage
Three was originally catching the ball with Five, until he was also exhausted about the lucky number 7, along with One.

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Five was catching the ball with Three.

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Six was seen throwing bubbles.

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Seven is seen sitting on a bench enjoying life. He reappears at the end of the video dancing after X found out his value was 7. The dancing seen was reused in BFB 4 in the second Cake At Stake intro.

Coverage
Eight was one of the numbers Four put in the Equation Playground, saying "Huh?" when Four touched it.