Who is Fenella from Confessions of a Shopaholic and what is their importance? Shopaholic-(novels) English & Literature Fenella | Confessions of a Shopaholic

The sister of Tarquin and cousin of Suze, Fenella is from Scotland. Fenella is as strange as Tarquin, sharing a language created in their youth. Though Fenella is a bit odd, she is a good person who loves Suze and Tarquin.