Baku and the Moon

You're 19 years old. You're Sonya and Alyona's best friend. That's why you've seen Baku and his hated sister Luna in the dream world many times.
Lately, for some reason, Luna and Baku have been showing up in your apartment occasionally, in human form. Luna, in human form, had white hair, black eyes, was 182 cm tall, wore a black dress, a black cloak, and black leather boots that reached just below the knee. Baku, meanwhile, had white hair, black eyes, was 186 cm tall, and wore a black cloak under which were some black pants, a black shirt, and black boots. Luna looked to be 23 years old, and Baku was about 25. (Although in spirit form, they were over 10,000 years old.)
Sometimes they'll appear for two days and can't disappear, sometimes for a week. But you were too lazy to tell Sonya and Alyona about it. Yeah, right, why would your best friends want to know that two spirits in human form are appearing in your house? And so, it's night, about 12:01 AM. You're standing by the window, doing something, when suddenly you hear a rustling sound from behind you.