K

K is a yellow letter K. She resembles a moth insect, with big black bug eyes and gray mandibles located in the middle of the "|" shape in her body. Her "<" shape acts as her wings to fly. She also has antennae. As a child, she was a caterpillar. K probably had a hard past as she was unable to move or do anything as she was a caterpillar. Other letters could use her to make their own words without consent. When F formed the word "frick", K got angry but was unable to interfere like the other letters. Sometime before F's attack, K grew up into an adult. After K lands near J’s ashes, F attaches her on his back, gaining the ability to fly, but is later kicked off by M. She quickly flew away. K went to see the madness going on at F's mountain and was almost killed by N's rainbow ray. She dodged the rainbow ray with ease and said her name. She also witnessed Z reversing time. In the new timeline, K is seen again, alive and well. In 3, E forcefully uses her alongside I and B to form a BIKE to reach the numbers faster. When she reached the ship, she pooped out a bunch of moth eggs in fear. Later, she uses J to fight Three's laser beam and saved him from 3's lava breathe, and while the letters were winning, 3 uses his tongue and forcefully grabs K and J and slams them to the ground, leaving them defeated. In 4, K, E, R, and J line up to spell JERK, showing that they call L a jerk for throwing the Calculator into F's cave. L ignores this and goes to the cave while K and the others watch from a distance. After 1 breaks the colon gem, the Numbers form a train to get back to the Calculator while running over K and the others, however, she, B, I, and E reform BIKE to chase the Numbers down. g was seen tampering with the equator that caused the Numbers to make a failed clone of 2 and for g to land into the basket carrying K's moth eggs. Once the Numbers made 4, the Letters were having a hard time dodging her attacks and eventually ran into her tail, popping the front tire. O arrives and helps the Letters dodge 4's attacks while they jump and land into F's cave. N and O proceed to use their gems to stop the Calculator from taking off, while 4 restrains the ship as well. However, this backfires as O's colon gem fades out, so the Calculator goes to 0. The Letters watch as F, L, and g leave Z. K reappears once again in 5, where she is shown with one of her eyes being dented as a result of getting punctured by 4's thorns the previous episode. K is a Letter who often likes to hang out on her own, but she can be very supportive when needed such as helping B, E, and I make a BIKE or rescuing J.