All of the Yakumo family are named after colors.Why Chen appears before Ran and Yukari comes from the fact that the orange light has phisically lower energy than indigo and violet.

• 因为八云一家的名字都是颜色,而橙色光的能量弱于蓝色光，而蓝色光又弱于紫色光，正是八云一家的强弱排序。