Mori Calliope is an English Virtual YouTuber associated with hololive, debuting as part of its English (EN) branch first generation of VTubers alongside Ninomae Ina'nis, Takanashi Kiara, Watson Amelia and Gawr Gura. The Grim Reaper's first apprentice. Due to modern medical care causing a decline in the reaping business, Calliope decided to become a VTuber to harvest souls instead. It seems that the ascended souls of the people who are vaporized by the wholesome interactions between VTubers go to her as well.That being said, despite the image her hardcore vocals and manner of speech gives off, she's actually a gentle-hearted girl who cares greatly for her friends. Signed to Universal Music Japan since April 2022.