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.
The Grim Reaper's apprentice has displayed throughout her streams, guest appearances, and music to a have cool, yet serious personality, with a timid side being seen when interacting with others for the first time, such as her senpais. Calli's cool attitude can be clearly observed in most of her streams, as she tries her best to impress her fans with her musical talent and occasional gaming skills.
However, she is not afraid to get serious about topics that may be on her mind, and engages in thoughtful discussions with viewers. This combination of a relaxed yet serious personality has earned her the admiration of not only her fans, but also the other hololive talents as well.
However, Calli's playful side comes out more evidently during collaborations with her genmates, displaying a side of Calli which viewers don't regularly experience. Calli still remains above all an avid hard worker who is regularly working on projects behind the scenes, often not sleeping for long periods of time. Despite the challenges that she may face while working on these projects, each one is very much rewarded and appreciated by her fans each time a new original song or cover is released.
Calliope is equally excited by both rapping and "reaping." Her favorite weapons include her scythe (nicknamed "Ricky") and the flail, a medieval weapon made from a spiked metal ball on a chain.
Calliope is noted for having one of the most lowest pitched voices in hololive, even more so than likes of Nekomata Okayu, Tokoyami Towa and A-chan. Although fluent in English, Calliope often fails to understand current modes of speech, such as the use of contractions or modern slang. She is easily flustered by romance, leading some to call her the "tsundereaper."
When not on camera, however, she is described as air-headed and hopelessly forgetful. Kiara has mentioned that she frequently misplaces things despite leaving them in an obvious place, like leaving her cellphone in her jacket. She also works exceptionally hard, perhaps too much so.
