Jakob is one of the many Merchant NPCs in NieR Replicant. He runs Two Brothers Weaponry just outside the Junk Heap, along with his brother, Gideon. They collect Raw Materials and parts found at Junk Heap and sell them or use them for forging weapons.
Forging Weapons: You can strengthen your weapons by bringing the required materials to Two Brothers Weaponry at the Junk Heap and paying a fee.
Jakob and his brother, Gideon run the Two Brothers Weaponry outside the Junk Heap. Although when NieR first meets Gideon, he was just a young boy. Their father died when Gideon was very young, and their mother has been missing for a while, so Jakob takes care of the shop and his little brother. He makes a living by collecting scrap metals and other materials to make weapons or upgrade existing weapons.
NieR first meets Jakob in Two Brothers Weaponry right outside the Junk Heap, when he goes to upgrade his weapon. Unfortunately, they didn't have the necessary materials for the upgrade so NieR helps them gather the materials himself. During their introduction, he also meets his younger brother, Gideon.
He finds out from Gideon that their mother has been missing for seven days since she entered the Junk Heap. The noble NieR, of course, volunteers to search for her. NieR discovers her body within the Junk Heap with the company of another male body. He has the option to let the brothers know what he discovered, or tell them he couldn't find her.
Jakob seems to have always known about her secret lover.
Two Brothers Weaponry Stock
|Silver Ore||Silver that was mined from the earth||1500 gold|
|Copper Ore||Copper that was mined from the earth||480 gold|
|Iron Ore||Iron that was mined from the earth||1000 gold|
|Dented Metal Board||A machine part||750 gold|
|Stripped Bolt||A machine part||900 gold|
|Broken Lens||A machine part||1100 gold|