Who said "Some bonds cannot be broken, not even by death itself."?

This quote is attributed to Drogon.

Some bonds cannot be broken, not even by death itself. - Drogon

"Some bonds cannot be broken, not even by death itself."

Drogon Relationships

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"The key to a happy marriage is communication."

"Marriage is about compromise and understanding."

"Life's greatest treasures are relationships."

"Trust is a luxury I can't afford."