Fumi has a very serious personality. She talks in big words and is emotionless in the first few levels of interaction. She is driven only by her work ethic. Her only interests are finding information on how to get back to her timeline and figuring out the the practical uses of of past tools/rituals. Her robotic personality is probably due to the oppressive time period she came from, which only seems to value government efficiency 
and little on human individuality.