Having a spine = Rückgrat haben Pretty much the same. Though I’d use it in the face of adversity, whereas “aufrichtig” is more of a muted, constant state of be

Having a spine = Rückgrat haben Pretty much the same. Though I’d use it in the face of adversity, whereas “aufrichtig” is more of a muted, constant state of being. Like sincerity, with a visceral touch.