Who said "The strongest people are often the ones nobody notices."?

This quote is attributed to Natasha Romanoff.

The strongest people are often the ones nobody notices. - Natasha Romanoff

"The strongest people are often the ones nobody notices."

Natasha Romanoff Strength

"I'm not going to fight you."

"Sometimes the best way to solve your own problems is to help someone else."

"I have a very specific skill set."

"You know, I'm actually a very good liar."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."