How does your muse feel about growing old?
Age doesn't bother her. She's surrounded by younger people everyday so her growing older almost slips her mind sometimes. Though since all her friends are younger than her, sometimes she does feel older than her actual age, especially since the age gap can very from three to nine years.
Their own mortality?
She's definitely one who seeks the truth in anything. Lying is not up her alley and if she finds out someone is telling a lie, she will seek the truth out of them no matter the cost. Her mindset is, the world can't move to peace if constant lies fill the air.
What kind of physical condition is your muse in?
She's in good condition. The only health issue she has is borderline personality disorder. I see it as a health issue because the disorder sometimes lead to her harming herself and/or shutting herself off from the real world.
Is death something they think about often?
No. Since she has a disorder, death isn't something she cares a bout. She thinks nothing of it.
No one can run from the one thing we all have in common.