Its so dear to me the theme of Sansa being the pure and innocent maid that inspire in unlikely/unconventional knights the desire of virtue and protection.
BRIENNE :
She called for the heroes from the songs, for Florian and Ser Ryam Redwyne and Prince Aemon the Dragonknight, but no one heard. [A Clash of Kings - Sansa IV]
I am coming for you, Lady Sansa, she thought as she rode into the darkness. Be not afraid. I shall not rest until I've found you. [A Feast for Crows - Brienne I]
SANDOR :
"True knights protect the weak." He snorted. "There are no true knights, no more than there are gods. If you can't protect yourself, die and get out of the way of those who can. Sharp steel and strong arms rule this world, don't ever believe any different." [A Clash of Kings - Sansa IV]
"I could keep you safe," he rasped. "They're all afraid of me. No one would hurt you again, or I'd kill them." [A Clash of Kings - Sansa VII]
JAIME :
Yet she could not deny that the godswood had a certain power too. Especially by night. Help me, she prayed, send me a friend, a true knight to champion me. [A Clash of Kings - Sansa II]
"I have made kings and unmade them. Sansa Stark is my last chance for honor." Jaime smiled thinly. [A Storm of Swords - Jaime IX]
