Keiji is an adopted nephew of Maeda Toshiie and Matsu. Known for his carefree nature, he enjoys participating in festivals and playing pranks on his step-family. Although he may appear distant towards them at times, he deeply loves them. His companion is a small monkey named Yumekichi. Keiji wields an overly large nodachi as his weapon, which he can use with ease despite its enormous size. Rather than carrying the sheath around, he throws it into the sky and catches it just when needed for combat.