This one is if me and some of my best friends irl were in a zombie apocalypse.

Rowan (RowanHunter): Leader of the group. Would know the most about survival (except maybe for Maria), and weapons. Would feel obligated to keep everyone alive. Would kill a friend to stop them from becoming a zombie but would blame himself for the death. "I could have done more," etc.
Super protective of Aisling. Tries to put his head over his heart but isn't always the best as it.

Aisling (Me): If Rowan killed someone she would try convince him it wasn't his fault, and there was nothing he could do, etc.
Tries to keep everyone alive, even at the cost of her own life. Fiercely loyal and brave. Pushes herself to the extreme.

Jack (jackguin1): Practical. Doesn't let his heart overpower his mind like Rowan and Aisling. At times sees himself almost like a third wheel to Rowan and Aisling. Sees Aisling at times as an innocent he needs to preserve (much to her frustration). Subtly challenges Rowan for leadership, and would probably be better at it because of the way he puts his head over heart (Rowan as quite good at this, but not quite to Jack's level, especially when it comes to Aisling).

Maria: Very bitter and withdrawn into herself. Aisling does her best to thaw her out and connect, but it isn't always easy because Maria feels her darkness would hurt Aisling. Not so subtly challenges Rowan's authority, believing her plans superior. If Rowan has forced to kill a friend Maria would try to keep Aisling away from him to give him space, not understanding that, even if he doesn't think so, that's the last thing he needs.

Again, sorry for the changing cases.