Miku Izayoi is a Spirit, Idol and one of the main heroines in Date A Live series. She is introduced as a student of Rindōji Girls' Academy who first manifested in this world in March, and transferred to Rindōji in April. She also works as a very famous and popular idol singer. She hates men to the point that Shidou even has to crossdress in order to interact with her. Her codename is Diva.

Her Angel, Gabriel has the ability to manipulate and brainwash people. She took interest in the undercover Shido because he wasn't affected by her hypnotic powers and challenged him to a contest in which that if he lost, he would have to transfer to Rindouji. The challenge was for who would earn the title of being the best school. There was a singing contest which was later won by Miku, but the title of best school was won by Raizen High School, which prompted Miku to summon her Angel and attack Shido.

Miku has light blue hair and eyes. Her Astral Dress is mainly yellow in color, with blue and white covering some parts of her dress. She uses a yellow moon hair clip with a flower petal connected to the curve ends of the moon, white flowers and petal can be seen next to the moon hair clip. While wearing a deep blue uniform, she uses a simple, yellow hair clip. 

Just like Kotori, Miku was a normal human before she became a Spirit. Her angel is Gabriel, and she has the power to manipulate and brainwash people.
 

Miku harbors a strong hatred towards men and treats girls as servants fit to serve her, which is why she transferred to an all-girls school, Rindouji all-girls private academy. Due to her past, in which people that were once her fans (mostly male) accused her of scandals in the past that were not true, leading to her losing her voice from the pressure and caused her to almost commit suicide. Even her opinion of women was initially poor, seeing them as replaceable servants at best and not caring if they died, even believing they should be happy to die for her. To the extent of her coldness, even Shido openly admitted he hated her.

She is very flirty, both before and after warming up to Shido, she expresses this towards most women who fit her type (and Shido) and is very blunt about it. After warming up to Shido, she doesn't hesitate to flirt with both him and the other spirits and does not even mind Shido having a harem, in fact, she pretty much encourages it.