As a lowercase letter, O ganged up with L to bully N. After L scared away R, I, E, D and S, l slingshotted o into n and then mocked him. Then, l and o laughed about bullying n. After f spelled “fart” and embarassing l, l and o beat up f. When f walked to r, i, c, and k to spell the word, o said his catchphrase, drawing the attention of all the letters to betray f.

Sometime before F's attack, O grew into an adult.

In O, O introduces himself, in front of an exhausted F. He then does a Sailor Moo