Wow, you have sharp eye!
Re the bird in his R and J 2 costume, I think I read somewhere it's in reference to his surname "Hanyu" (with wings).
I've read somewhere, must be in his forum or twitter that it was part of his superstitions, kinda like to lift him up or something. I don't really remember much
You really are fascinated by Yuzuru's flawless skin. My skincare is mostly just wash and moisturize, but here in Korea, the skincare routine has more steps and a ton of products available for each step. I must say it works as Korean women have, just like Yuzuru, beautiful skin.
I'd say it's Yuzu's gene and not skin care routine. My cousins are half Japanese but they don't have that complexion. Most Korean women indeed have beautiful skin but those I knew from work says it's a high maintenance routine.