Who said "I stand firm in my convictions, come what may."?

This quote is attributed to Lady Sif.

I stand firm in my convictions, come what may. - Lady Sif

"I stand firm in my convictions, come what may."

Lady Sif

"I am a warrior of Asgard, and I will not falter in the face of darkness."

"Strength is not measured by the power of one's blade, but by the resolve of one's heart."

"A true friend stands beside you, not behind you."

"We are forged in battle, but refined through compassion."