Roberta "Robbie" Stevenson is a character on The Journey of Allen Strange, portrayed by Erin Dean. She is a 15-year-old girl who enjoys surfing and helps show Allen how to fit in with humans and her brother Josh does science. Robbie was the first human who reached out to help Allen, and she's become his best friend on Earth. Allen's lucky to have Robbie as his guide to his new planet--she's smart, she's independent and she can really keep a secret. Maybe Robbie and Allen are so close because they have something in common--they both know what it means to miss something. Allen misses his family back home on Xela, and Robbie misses her mom, who lives in San Francisco.