The Numberjacks Characters 

3, 4, 5 and 6 are the principle characters, and appear in every episode.

3 is busy, lively, a bit “Me me me!” but growing up.  Slightly odd and eccentric, noisy, fun and full of herself.  Very keen to be seen as one of the bigger numbers – “I can do it!” - but not quite ready for it yet.  A wildly ambitious jumper, 3 has a collection of beautiful things. She doesn’t go out on missions in the earlier episodes, but graduates to doing so later.  She is the principle operator of the Brain Gain machine. 

4 is a regular sort of number – nice, steady, quite grown up.  He’s four-square, steady, logical, measured.  Not hugely self-confident, tries not to panic.  “I’m not sure, but I’ll try a bit more.”  Still happiest at home, not entirely happy as a jumper, but OK as long as things don’t go wrong.   4 is the mechanic of the Numberjacks, and likes fixing things.  He likes trains and playing with the Bloop Ball.  He is the main screen operator.  

5 is definitely grown up, she’s perceptive, sorts things - quite cool, creative, artistic. Likes looking after the smaller numbers some of the time.  Loves jumping, does it with grace and style, outgoing.  “I’m fine!”  She’s a good and cool singer, has a good fashion sense (for someone who never wears clothes).  In each episode 5 speculates what else might go wrong, which we see as a 2-d animation.

6 is a “bigger” number, play tricks, is good fun.  Quite physical, he’s a  cool jumper, sometimes a bit too flash for his own good.  He tends to be the leader of the Numberjacks, though perhaps not as bright as Five.   “Did the trick!”  He loves cars.  6 usually decides who will go on the Mission.