Sachi was a petite girl with shoulder-length black hair and a small mole right under the corner of her right eye. She wore a light blue tunic with a chestguard, a knee-length short skirt and grayish boots. In battle, her weapon was a two-handed long spear. Although she temporarily tried out wielding a sword and shield to help Tetsuo tank monsters, she eventually had to switch back to using a spear due to her fear of fighting monsters at close range.