Theo and Cleo's seven-year-old son. He loves to read "Cliff Hanger" books and always looks forward to the next one, much to Leona's annoyance. Lionel can get flustered when his family embarrasses him when they are devouring their food or if he is reading a baby book to Leona, but he loves them just the same. Since Lionel is always so self-confident, he is often convinced he doesn't need any advice or help with his problems, but he always ends up needing it after all.