K probably had a hard past as she was unable to move or do anything as she was a larva. 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 a