Who said "The red keep holds many secrets."?

This quote is attributed to Tyrion Lannister.

The red keep holds many secrets. - Tyrion Lannister

"The red keep holds many secrets."

Tyrion Lannister Truth

Character in A Storm of Swords

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"I drink and I know things"

"Some old wounds never truly heal."

"Justice is a word."

"Gold buys allegiances."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."