Warren, 15, is the eldest child of Pete and Diane, sister to Hillary, and stepbrother to Bert. But while he's the oldest kid, he doesn't always act like it. He'll defer to Hillary and her superior intellect and happily plays with young Bert. Warren is one of those rare teenagers who loves everyone, especially his parents, and thinks they're all so cool. Kate included. He's been known to refer to his parents and himself as "The Wrecking Crew."
Warren completely lacks self-consciousness, writing erotica about his crushes, being open about what's going on in his life, and unabashedly still loving Legos. He's very happy where he is in life right now and is not intent on growing up or becoming an adult. While Warren may not feel awkward, it doesn't mean he isn't.