It's a verbal tic (I think that's what it's called. I'm not entirely certain). She's saying myon like cat girls ending with Nyan after everything they say and dog girls with Wan Wan etc. At least this is what I believe.
Mister human and uneasy bodied should just go away!-denlySud-That's right!
Reimu and Reimu's family did their declaration already!What do you want no ze?
This is Marisa's home no ze!Yuaaaan!?