She appears just like Riley, but she has dark skin, orange eyes, and hair. He wears the exact outfit that Riley wears, along with having the same necklace. he necklace that the dead sibling has, was a gift for Riley. They had two and gave the other one to Riley. It is unknown how the dead sibling died, nor what her name is, hence his name is just Dead Sibling.The Dead Sibling had many gifts for Riley, but due to their death, she couldn't give them to her physically, and kept them in a chest.