X (TV 2001): Kotori Monou and Hokuto Sumeragi

Kotori is Fūma's younger sister, who is a young girl with a congenital heart condition, and a developing dreamseer. She is also able to communicate with plants and animals and her dream was to become an indigo dyesmith. While Hokuto is Subaru's twin sister and a dear friend to Kakyo after meeting him in her dreams. This is from the OVA, "An Omen".