I think Park Min-seo makes "battle faces" on the level of Arakawa Hiromu.
She many times darkens the characters' faces, but the "white eyes" is a classic one, but quite difficult to pull off.
It lowers the details, but sharpens the lines and makes the faces so cool to look.
And Melrose just having a panic attack... is it just me or did he swoon for Mustain in page 23.