Calamity

Calamity is a ghoul Doctor stationed in Jacobstown as Dr. Henry's research assistant looking for a cure for the  Nightkin's aggressive tendencies. She is equipped to repair most of the equipment you might be carrying. She also sells many different medical supplies, including up to 30 Stimpaks at a time.

If you fast forward three full days, she will replenish her supply of Stimpaks so make sure you save up some caps and go shopping in Jacobstown!