Would you allow her to touch your character? Sure, the TARDIS doesn't mind being touched at all.

If wounded would you allow Ashley to actually heal your character? Yep, she has no issues being healed up.

If there's need to wound your character would you allow it? Yep.

She only has a set supply of herbal medicines, if you are in need of one would you be willing to do a favor later to pay for it? She would, anything within her power to help.