MC as in https://en.wikipedia.org/wiki/Master_of_ceremonies
The hiphop scene has used the expression as well but it is a lot broader originally

that's not only MCZ's stuff))

I heard this endless "hey!" shouts on performances other japanese rock groups (Kishidan for example) and it's really annoying (often annoying than not)

From most favorite to least:

1. Arin
I thought she was cute when I started to follow MCZ, but the pink color kinda put me down, and also her singing is unique. There was a chance during an event, where the fans could walk near and take pictures close to them. At that time, Arin, Shiori and Reni were there together, and they were very nice and they were talking as much as they could to all of the fans. Those three are my top. Anyways, as I was making my way back to the seats, Arin called out Hello in English and I was very surprised that she took this effort. Her English I think, is really good. Reni and Shiori are nice too, but meeting them at this event kinda made me an Arin fan. She is so cute in real life. The fans were in a line and had to walk from one end of the stage to the other and back to the chairs.

2. Reni
She is my second favorite because she likes to wear hot pants so we can usually check out her legs. Also, she has a really nice smile, and is a loose cannon. I don't think she can leave an event without surprising her fans in a good way. If the sun ever goes out, her smile will continue to power this earth.

3. Shiori
My third favorite, she is incredibly talented and has a sharp sense of humor. She was my top for a year, because I tried following her as my kami oshi for a while, but after that I was pulled by Arin. I still think her solo songs are some of the best, right after Momoka. Like, Namida me no Arisu, and Sotsugyo.

4. Kanako
She was my first favortie when I started to follow MCZ, and I even chose red for my first bicycle in Japan because of it. As the leader of Momokuro, I think she has done a lot to make the group famous, like the Ebi Sori Jump. She also has a unique singing style. Alas, soon after I started following the group she cut her hair short and then I started following Shiorin.

5. Momoka
Super cute and super talented, but as a fan I fall for the more charming and funny characters? I think she is really cool, and I get that she is serious and thoughtful, which is important. She looks so serious in programs like Tsugi no Kata and Folk Mura. She has funny moments too, but I'm more drawn to the other girls.

They're all Beautiful ladies aren't they? Anyway, I'm with you on Aarin's color: I'm cool with pink, but it's not a color that I would purchase on any normal circumstances (plus, it wouldn't be a safe thing for me to do here).

Plus, I really miss long-hair Aarin! She still beautiful now, but she was FLAWLESS with that long-hair look. Heck, whenever she's on stage with that lovely hair out, she looked like a Greek Beauty Goddess had just entered on planet Earth and is supported by her attracted minions!

Heck, I really wasn't a fan of Kanakos hair cut either (at least when it was VERY short). It was like if Kanako got replaced with Taka!

Finally, as far as your opinion on Shiori/Momoka's talents, I would argue that ALL of the girls are talented as well!! Even if one can do one thing better than the other, the fact that they all can still pull it off and have other similar features in their abilities is enough to impress me at least.

I mean sure, Reni seems to over exaggerate her dancing at times, Kanako may have pulled off some airhead moments,and Aarin's singing voice happens to be my least favorite among the 5 girls. But the fact that they all can play (certain) instruments, sing for a long time without their voices getting affected, and perform for a long time is enough for them to earn my respect. Plus, those 3 can sure make you all laugh!!

Just want to bump this thread for any new members of this forum.