Gertrud

General
Gertrud is a weaponsmith.

If you deliver her the required input amount of crafting materials and pay her a fee in gold she will craft you one of the weapons from her "menu".

Also, for a fee of 10 gold she can customize a weapon for you, which will increase its damage by 20%, but means that no other character except the one it is customized for can use that weapon.

Location
Gertrud can be found in Vasburg Armory.