[Galvantula]

Wow Leo's lasting longer than I thought. Plus Kengo suits up as Fourze? This should prove to be very interesting.

On that note Gamou hasn't been the most active or the most evil but he's certainly one of the bigger jerks of the Kamen Rider franchise.He went from:

Gamou: Aw so you wish to support my goals? I bid you welcome to the Horoscopes!
Members gained:Libra,Virgo(to a certain extent, was triple agent for the Kamen Rider club),Leo

to this:

Gamou:I see you wish for power. I shall make you part of the Horoscopes as that is your destiny!
Members gained:Scorpio,Cancer,Aries,Aquarius,Capricorn,Taurus

And these this:

Gamou: Even if you don't wish to join me I know Libra has found the glow of the constellations in you. You will join the Horoscopes!
Members gained:Gemini(only the dark side of the Switcher)Pisces(didn't truly join the Horoscopes)

And now he's at this point:

Gamou:Soon I shall finally see the Presenters at long last!
Hayami: But wouldn't the pull from the Dark Nebula destory the city and everyone in it?
Gamou:"shrugs" It's a small price to pay to gain the power I rightly deserve!
Hayami:0_0

So yeah, he's up there with both sets of Worms and the Shockers in jerkdom.