Calliope is 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.
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.
Calli is a shinigami, a spirit being of death similar to the western concept of the grim reaper. Her purpose is to carry souls of the dead to the afterlife, although she is on hiatus from this job while working as a hololive member, and has promised not to kill anybody.
She comes from the Underworld, the realm of the dead. The Underworld mimics the aesthetic of the current era, so it looks mostly like a modern city.
Calli's scythe blade is made of stainless steel. She is able to summon and dismiss it at will.
Calli currently inhabits a humanoid body. She was surprised to learn that it requires sleep to function, which she found bothersome.
She likes slaying people, dark spaces, flowers, beanies, stuffed dolls, sweets, the color red, mafia movies, rap (especially Japanese Internet Rap; she claims that she met the genre in the Underworld because it was dead), red wine, and "Death Sensei" (the Grim Reaper) as she is a reaper in training.
Because of her passion for rap, Calliope released an original song on her debut stream. She also announced that she would release her first EP for free to thank the support received, including four songs, an instrumental and an acapella version, some of them written by herself.
She dislikes crowds, coffee, hospitals and cantaloupe.
Her favorite games include games from FromSoftware, Ghost of Tsushima, Castlevania: Symphony of the Night, weird RPG maker games, and platformers (preferring side-scrollers).
Her goals and dreams include becoming a great track maker and mixer, collaborating with other VTubers and people, supporting her fellow first gen members, becoming an expert in Japanese, writing and performing an anime or video game opening song, and writing a full album.
She can be very sexually active, she can be a little bit arrogant in bed and she's very dominant. She's bisexual.