Trivia. The kanji used to write "YoRHa" in Japanese (寄葉) means "passing leaf." According to Yoko Taro, the unusual capitalization in "YoRHa" is meaningful, unlike the capitalization of NieR which was done simply to make the logo look more interesting.

Why are YoRHa units blindfolded?

NieR:Automata™

Lets not forget. That blindfold is made of fabric so no way it's a visor and without it, they might not fight as aggressive as having them on.

What was Project YoRHa?

Project YoRHa is a comprehensive information project intended to enhance android morale. ... Having lost the one thing which they were programmed to protect, android morale began a precipitous decline. Concerned by this turn of events, Command designed Project YoRHa as a means to lift android spirits.