"What You're Made Of" is a 2020 single written and performed by violinist Lindsey Stirling featuring guest vocals from Kiesza.

"What You're Made Of" was written by Stirling, alongside RuthAnne, Wendy Wang and producer Gladius for the second anniversary for Global or English version of mobile video game Azur Lane.

Speaking about the song in the official press release, she said: "I’ve always loved anime art and I was ecstatic when I got to write a song for an anime game that revolved around female empowerment.

It’s in the moments of near defeat that you chart your truest fate because the way you react when you’re at the bottom really shows what you’re made of.

She would later join Stirling's Artemis World Tour as a guest performer.