Who said "Strength isn't just physical. It's mental."?

This quote is attributed to Valkyrie.

Strength isn't just physical. It's mental. - Valkyrie

"Strength isn't just physical. It's mental."

Valkyrie Strength

"I'm not a people person."

"Scrapper 142 - that was my name. Not a great name, but it's what I had."

"You're a good warrior. Too bad you're also stupid."

"I've been fighting my whole life. It's the only thing I know."

"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."