Tasuku Kurosaki

Tasuku Kurosaki (黒崎 祐, Kurosaki Tasuku) is the 24-year-old main character of Dengeki Daisy. He's a school custodian at Teru's school, who forces her to become his "slave" after she accidentally breaks a school window. It is also later revealed that he is DAISY, the anonymous person who's been sending her emails through a phone that her brother gave Teru before he died.