Ultraman monsters spotted in Big Brother reality show

Personally, I'm not a fan of reality shows. However, I happened to catch a glimpse of 2, possibly 3, Ultraman characters painted on the walls of the"Big Brother house" during season 18, episode 8.

The two monsters I recognized were Redking and Gomora (which was given an artistic expression in green). There was also a frog-ish monster on a seperate wall in the room, which I didn't get a picture of. Unfortunately I couldn't identify the character.

Blurry video of all 3 characters can be seen starting around the 17:30 mark in the video link below

https://m.youtube.com/watch?v=gF4g_PcTcy0