Jeremy: sensible, logical, always tries to think things through. An absolute fish out of water in a world where you have to fight monsters to stay sentient.
Miranda: reckless, adrenaline junkie, constantly pulling more and more dangerous stunts in an effort to distract herself from a hundred separate cases of PTSD. Easily guilt tripped, and will throw herself in harm's way without hesitation in a mixture of trying to fix her mistakes, and an effort to punish herself.
That is to say, she's not very sensible.