Who said "I've learned that people are complicated."?

This quote is attributed to Sansa Stark.

I've learned that people are complicated. - Sansa Stark

"I've learned that people are complicated."

Sansa Stark Knowledge

"I am of House Stark. The North remembers."

"A lady should be gentle and kind, but that does not mean she should be weak."

"I want to go home. Is that so terrible?"

"The world is not kind to girls who are clever."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."