Who is he and what is he doing there?
It's not an o-waraibangumi or something, they discuss Marara-san (Malala Yousafzai) and it's serious, though somewhat stupid.

He's a heavy metal singer, and he regularly appears as a commentator on both serious and comedic shows, always in the makeup though.

[Katsuo]

RandomQuotes Wrote:he regularly appears as a commentator on both serious and comedic shows

also sumo.

His name is Demon Kakka / デーモン閣下

Thanks a lot.

Is this the same guy?
By Amaterasu, he IS loud. I like it very much, at least I can hear something.

Sorry,
here's the link:

[Katsuo]

Yes, it's the same person. He's tweaked his stage name a few times over the years.

From his Japanese Wikipedia page:
「デーモン小暮」（1986年）、「デーモン小暮閣下」（2000年）、「デーモン閣下」（2010年以降）