D

D has a cheerful but danger-prone personality. As a lowercase letter, d was friends with F, R, I, e, n, and s. One day, l and o beat up n, which caused f to get angry. F made the word "fart" to embarrass l. l and o got revenge and forced f to spell the word "frick," d along with all the letters, got angry, and e used him as a weapon to hit f, which caused him to trip over n.

Somewhere before F's attack, D turned into an adult.

In D, F sprints at D and starts hitting him until he faints. In E, F uses D to knock out E. They both were kidnapped and put in chains in F's Cave.

In Now I Know My ABCs, Z reverses time, and D becomes lowercase again.

After the event of Alphabet Lore, he grew up and did what he did.