Eh, we knew it was Sonoda ever since someone found that anagram in her name. The mannerisms we can work out fairly easily really, she's in love with him like Oshgui is for her, so she's imitating him. That and deliberate red herrings like the hint Oshgui was Scorpio with his horoscope whenever that happened. Also I'd hope the members of shadowy organisation would have the sense not to act the same in both forms, especially in front of kids you know are the enemy.
I agree with you; I also think it's very possible that all three of them- Sonoda, Oshgui and Garren are the Zodiarts. That would be interesting.
At first glance, I didn't like Fourze's suit or the introduction of the main characters, but all of them grew on me quickly, with the exception of JK. I found him a bit too much of a jerk/coward, it probably takes me a while to warm up to him.
That beside, I enjoy everything about Fourze. I don't mind the cartoon-ish or comical sounds and effects they used in the show either.
The most enjoyable aspect of the show is probably their friendship and group work, which is rare in Kamen Rider shows. Beside Kabuto and Den-O, I can't really recall any series that the Riders have such supportive group of partners. So everything about Fourze is just so fun and... fluffy for me :laugh: