Ange Katrina is a female Japanese Virtual YouTuber and member of Nijisanji. She is an alchemist from the Helesta Kingdom. She is also known as "Night Butterfly", an alleged seductress. Ange has an unusually deep voice which gives her an image of a cool girl. She plays in to this image with her catchphrase "Omatase, Matta?" which roughly translates to "I'm here, did I keep you waiting?". The answer to this catchphrase is "Uun, ima kita toko♡" which translates to "Not at all, I just arrived myself". Although she flirts a lot with other livers for laughs, she appears to be very shy to strangers and quite an introvert, often fumbles in her words and turns silent in conversations with livers she is not accustomed to be with. However, she excels in free talk streams and even able to do 6 hours stream of entirely free talk. Lize Helesta describes her as a bit clumsy but kind-hearted and very perceptive of her surrounding while Inui Toko describes her as "very kind, she is human embodiment of kindness". Ange is known to like NTR genre of fictional works. She said it is only for fictional work and cannot take it in reality, however. Ange's height changed from 147 cm to 160 cm through drinking a failed alchemy potion meant originally to enlarge her breasts.

YouTube
YouTube is an American video-sharing website. YouTube allows users to upload, view, rate, share, add to favorites, report, comment on videos, and subscribe to other users. It offers a wide variety of user-generated and corporate media videos. Available content includes video clips, TV show clips, music videos, short and documentary films, audio recordings, movie trailers, live streams, and other content such as video blogging, short original videos, and educational videos. Most of the content on YouTube is uploaded by individuals, but media corporations including CBS, the BBC, Vevo, and Hulu offer some of their material via YouTube as part of the YouTube partnership program.

Nijisanji
Nijisanji is a group of mostly 2D-only Virtual YouTubers who are also known as "Virtual Livers" when posting on sites outside of YouTube, such as NicoNico Douga and Bilibili. The term Liver, coined by mixing Japanese and English, is a heteronym for calling Nijisanji's streamers.