Honorable thief who eventually became a consultant, is good friends with Mack Hartford
He is an anti-hero.
He is an anti-hero at first and later turn into a good hero.
Discovered and awakened a Lemurian princess whom he made his partner as Natsuki Mamiya. Masumi felt like an older brother to Natsuki.
Was just friends and teammates with Ronny Robinson, not having any special bond whatsoever.
His life was manipulated by Yaiba of Darkness in an experiment to bring out the darkness within him.
His life was never manipulated by anyone. But while undercover, he was manipulated by Miratrix to help her freeing Kamdor. Later, held a rivalry with Kamdor due to both having similar goals in stealing the required treasure
Quits the Boukenger first due to confidence issues associated with Yaiba, then until he finally returns during the final crisis with Gajah
Pretends to quit Operation Overdrive to get a parchment from Miratrix. But failed