About: This guy seems to live in every era! We've seen him in historic books, generally sucking some guy. He's looking for the Haremverse Hero who can save his own era. To do that, he tests as many as he can in time and space. But sometimes, it's not him, but a descendant or ascendant. It's complicated, this wibbly wobbly timey...
His outfit is based on The Great Saiyaman suit but without the cape and is blue. His name, Harem Rider, is a reference to Kamen Rider, a popular Japanese superhero since the Showa Era.