Was a detective, using his job to effectively cover up his illegal activities, disposing of any witnesses to his acts.
Is not a detective nor a criminal, but has a bad intention of attacking and venting each Rider just to earn those one million dollars as a 'reward' from Xaviax, which he never even vent a single Rider.
Had a partner, the older Tomoyuki Kaga, until the older man's demand - for a bigger cut in the profit - made Masashi kill him.
Never had a partner in crime nor did he killed anyone, but he is yet greedy.
A family of his was never mentioned in the series.
Was from a rich family.
Attacked Reiko Momoi to avoid being caught for killing several people, including Kaga.
Never attacked Michelle Walsh. In fact, he has never even met her.
Dissolved and was sent to the Advent Void by Kamen Rider Wing Knight along with Volcancer, while his Advent Deck was still stable and claimed by Len, later given to Ian, his Ventaran counterpart.
