Complex sentence: Samantha Smythe, a vivacious squash-blonde-haired 17-year-old who's the steady girlfriend of Bingo--she and he get along so well together, even if it's at the chagrin of her tough, militant-minded father.
Split into simpler sentences: Samantha Smythe, a vivacious squash-blonde-haired 17-year-old. Samantha is Bingo's steady girlfriend of Bingo, to the chagrin of her tough, militant-minded father.