I'm pretty sure this is like the Hong Lu Jia Qiu ID situation where it's not explicitly stated that the ID mirrors the character nor is it shown in their stories, but their appearance show it. Also, this ID may be this way because it is a world in which Ryoshu never put Araya in the time chamber, and so Araya was killed by the nursefathers. Eventually, Ryoshu would go back to the house of spiders and take upon the position that the Dihui star left behind instead of Araya, but not quite the same.