Mabel Pines is the twin sister of Dipper Pines. Energetic and optimistic, Mabel makes the best of every situation, with a big goofy smile, while at the same time annoying her twin brother, Dipper. Mabel Pines is a buoyant and energetic optimist who skips through life with a braces-filled smile and an assortment of extremely colorful knit sweaters. It is her outgoing personality and fearless curiosity that comes in handy when Dipper needs help solving a mystery, even if she isn't always aware of it. Mabel lives in a world of pre-teen novels (most about vampires), and her fixation on finding her one true love occasionally lands her in sticky situations which ultimately require her brother's help. Still, despite the weirdness in Gravity Falls, Mabel is always a "glass half full" kind of girl.