Korone is an android that was sent by the God Mahct to observe the new demon king.
Korone comes from a race of androids known as Liladans. She was sent by the government to monitor Sai Akuto 24/7.
As expected of an android, Korone doesn't show many emotions. Despite this, she does have a curiosity about most things and can display some human characteristics. On one assignment, she is asked to try and provoke a sexual response from Sai and would constantly be teasing him. Even before this though Korone would be teasing Sai.
She often tries to sleep in the same bed as Sai, much to his dismay. After his objections, she decides to sleep in his closet, where she can usually be seen watching him from a crack in the door.
Korone has the ability to store many large items in her handbag. Some of these include over sized firearms. She can also read the emotions of other people and detect their mana levels.
Korone after having her tail cord pulled.
Like any other Liladan, Korone can be deactivated by pulling a cord, which resembles a rabbit's tail. The cord is located on her lower back. Upon Sai's first attempt to deactivate Korone, she accused him of trying to peek at her underwear.