Annika is a 21-year-old VTuber who streams games, primarily visual novels and RPGs, online. She is known as Nooroo, and her fans are known as Noocomers. Her avatar is drawn by her, and is a girl similar-looking to Annika with mouse features. She’s looking into becoming a bigger artist to make her own games, but her fanbase wants her to stay and continue playing games for them.

Annika has a very high-pitched, squeaky voice, almost like a mouse. She's incredibly quiet, however, and she stumbles over her words or mumbles plenty. But when she's in a good mood or talking to a fan, she has a sudden air of happiness and cheer about her.