October is a typical teen. Almost.
With her big sis being the popular gal of the school (despite her best efforts), her mother being fairly demanding and constantly concerned about her image, and her father being carefree and often not even there, her upbringing strays a tad from the norm. Still, she's newly getting into boys, music, older idols, and putting away the childhood antics. She also looks up to her big sis, for better or for worse.
If you want to write as October, look back to your inner teenager and remember the trials you faced when going through puberty. Use her current Tumblr posts as a guide to help you understand the extra quirks that make up October's personality: http://oct0berthe2nd.tumblr.com