Romina

Jinjin is a blacksmith trusted by Kizuna and her companions, and he has a red gemstone on his chest. He is a serious craftsman who drives out overly cheerful customers. When Naofumi Iwatani and his party arrived in Kizuna's world, they received his assistance. The two also exchanged techniques, such as when he remodeled Naofumi's barbarian armor into the "Barbaroi Armor."