Besides being the role of female actress Juliette Lewis in the Oliver Stone film "Natural Born Killers" there is more than one artist with this name (see links in the Wiki sources):
These are photos from concerts where Mallory Knox played, so they may be of other bands that played the concert as well.
Slam Dunk Festival 2024 May 26, 2024 Leeds, England, United Kingdom Uploaded by Mark Hutchinson
Slam Dunk Festival (North) May 26, 2024 Leeds, England, United Kingdom Uploaded by Russell Kehely
Slam Dunk Festival 2024 May 25, 2024 London, England, United Kingdom Uploaded by Unusual Chris
Slam Dunk Festival (South) May 25, 2024 Hatfield, England, United Kingdom Uploaded by Russell Kehely