Chihiro Ogino, referred throughout most of the film by her nickname Sen (Sen, lit. "one-thousand") is the ten-year-old core protagonist of the Japanese animated film Spirited Away.

Chihiro's growth into a capable individual is a core factor to the movement of Spirited Away's plot. During her adventure in the Spirit World, she matures from an easily-scared girl with a child-like personality to match her age to a hard-working, responsible, and brave young girl who has learned to put her fears aside for those she cares for.