The Last of Us: Part Two – Who could be Ellie’s NPC Companion?

Ellie and Friends from The Last of Us 2

It was confirmed for the Last of Us: Part Two that our main character Ellie will have an NPC companion. Much like she was in the original game. Who could this companion be, will we see the return of a series favorite or someone new? Will this NPC be able to fight with Ellie as she encounters danger along her travels.