This artwork was commissioned by me and drawn by sbigbro:
twitter/sbigbro
I have permission to distribute this work.

This is the completed crossover concept of Ruby Taylor, my Elite Guard OC from my Doom fanfic "Day of Wrath," styled after the Dead Space franchise and Alissa Vincent from Dead Space: Downfall, the character that initially inspired her design.

Ruby's armor (Elite Guard RIG) is based on the Advanced Soldier RIG (the Military Suit or Level 6 Suit), and her Vorpal Sword is inspired by the iconic plasma cutter and even the badass plasma saw from Dead Space: Downfall.
And in this interpretation, Ruby's demonic left arm is covered in Marker plating.

"Day of Wrath" is mainly posted on SpaceBattles
https://forums.spacebattles.com/threads/day-of-wrath-doom-2016-eternal-rewrite.846388/
And AO3
https://archiveofourown.org/works/26011756/chapters/63245599