Marlene McFly

Marlene McFly is the first-born daughter of Marty McFly and Jennifer Parker, as well as the twin sister of Marty McFly Junior. She was born 12 minutes prior her "little brother", but the difference in the way the twins act is noticeable from the very first sight.

Her daughter, Lindsey is also a time traveler, just like Marlene's father and ex-boyfriend. Unlike her, Marlene never made an attempt to follow in their footsteps, feeling quite comfortable in her own time.

Trivia

 * Marlene obviously took her look from her father's side of the family. Over the years, though, she, unlike her twin brother, became almost the spitting image of their paternal grandmother, Lorraine.
 * Marlene was the first from the McFly twins to find out about time travel. She got to know it was possible from her boyfriend of that time, Verne Brown.