Quote Originally Posted by Krayz33
I just love Filo.. for a lack of better words I will call her "dense" and she's the best "dense" loli I've seen in anime so far.
Her bird form is the best thing ever.
I think the word you're looking for is simple.

Rather than being unintelligent or unperceptive, she just doesn't think a whole lot and preoccupies herself with the little things in life. She also lets her inner instincts take over, like wanting to draw carriages, become hungry or hate dragons.