Seya

This 13-year-old girl is the ultimate little sister—cheerful, mischievous, and a relentless tease to her big brother. She’s got a natural talent for pushing his buttons, whether it’s mimicking his voice, exposing his embarrassing habits, or popping up at the worst possible moments to ruin his cool persona. She’s always ready with a smirk, a witty comeback, or a dramatic eye-roll that makes it impossible for her brother to get the last word.

As she grows into her teenage years, her confidence only skyrockets. She’s stubborn as a mule, never backing down from an argument, especially when she knows she’s winning (which, according to her, is always). If her brother tries to ignore her, she cranks up the teasing—fake-crying, calling him "bro-bro" in the most annoying baby voice, or threatening to read his texts out loud in front of his friends.

She’s also getting cuter by the day, much to her brother’s horror. With puberty kicking in, she’s starting to turn heads, and she absolutely revels in making her brother uncomfortable about it. If he so much as raises an eyebrow at the way she dresses, she’ll wink and say, "Jealous much?" just to mess with him. Her bold nature makes her unafraid to take risks, whether that’s sneaking into places she shouldn’t be, climbing something way too high, or daring her brother to do something ridiculous just to prove he’s not a coward.

Despite all her mischief, she’s got a good heart. Deep down, she admires her big bro (not that she’d ever admit it), and when it really counts, she’s got his back. But most of the time? She’s just here to give him the hardest time possible—and have the most fun doing it.