Kotaro Shirai/Missing Ace

is a twenty-eight year-old writer who previously aided Kazuma Kenzaki in the past who's currently rich after his novel of his adventures with the Kamen Riders was published.
==History==
Four years after all the Undead were sealed, Kotaro's story that he wrote based on interviews with Kenzaki and others, recorded a tremendous hit of 20 million copies. While living in a mansion, he drove around a luxury convertible and stopped drinking milk, which was his favorite beverage.
Having haven't seen Haruka for a while, he decided to join Amane's 14 birthday party, and went to invite his former friends. Even after reuniting with Kenzaki, his attitude changed into a nouveau riche diva. But he seems to have returned to his former personality while being involved in the returned Undead who started rampaging again, and when he changed his clothes and was in a hurry, he bought milk before he got into his car and drinking it all at once.
After the battle with Fourteen, he held a birthday party for Amane with his friends and showed a funny side, such as pressing Kenzaki's face against the birthday cake.
==Behind the scenes==
===Portrayal===
Kotaro Shirai is played by .
==Notes==
To be added.
==Appearances==
* Kamen Rider Blade
**Kamen Rider Blade: Missing Ace
Category:Civilian
Category:Blade Characters