Nice Guy: Before the loops. Still is after them, albeit very broken.
Red Shirt: What he was before spending a year in the loop.
Rita "Valkyrie" Vrataski
The Ace: How she's viewed by the world in general.
Broken Ace: She's just a lonely girl, fighting against a truly horrifying enemy while knowing what they are actually capable of without the ability to share the burden with anyone. Until she meets Keiji.
An Axe to Grind: She is the first user of the Battle Axe on the battlefield and the one who inadvertently passes the skill to Keiji.