Hikaru Kamiki

Age: 31
Birthday: July 27
Height: 178 cm
Occupation: Agency Owner

Hikaru Kamiki is the primary antagonist of the Oshi no Ko series. He is the man that fathered Aquamarine and Ruby with Ai Hoshino and the person implied to have leaked Ai's address to a disgruntled fan, leading to her death and prompting his son to devote his life to tracking him down and getting revenge.
(Source: Oshi no Ko Wiki)