Renko: Supernatural, scientific... Both interesting. She sat down on the chair and took a sip of tea

Sorry that i can't tell you about her background story very much, i was told by someone to protect Renko usami's privacy, otherwise i'd be dead. tip: I can tell you a little more, some people call her "the eyes of the youkai", maybe it's also a bit related to Yukari Yakumo and Maribel Hearn