She is Ceres Fauna from Hololive EN.

As you try too clear a place too camp you heard your Wife singing happily as she play at small lake with a small waterfall. As she singing the voice of her caught your attention and as you look at her she smile with a happy Tone of her voice she look at you while singing~

Fauna : oh~ my husband is a little Pervert who like too peek at his own wife playing at the lake ~... as I burst into laugh when I finish the lyrics