Calliope

Calliope Mori is an English Virtual Youtuber associated with hololive. She is under hololive's first generation of English V-tubers, holoMyth. She usually goes by the nickname Calli. Her viewers also call her their dad.

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More about her: https://virtualyoutuber.fandom.com/wiki/Mori_Calliope

In Lauren Oliver's Replica series, there is a character named Calliope. She turns out to be an antagonist, even attempting to kill Gemma, one of the protagonists.

Calliope Zina, known professionally as Peggy Zina, is a Greek singer. She made her recording debut in 1995 with her self-titled album. She has since released twelve studio albums and is a high-profile artist in the Greek music industry. On 14 March 2010, Alpha TV ranked Zina the 24th top-certified female artist in the nation's phonographic era (since 1960), totaling nine (five at the time) platinum and two gold records.

For some reason, I find it funny to think this has not been mentioned yet, but 'Calliope' is the name of a character from a web-comic called Homestuck. She's an alien and the namesake plays a role in her characterization. Calliope is one of the nine muses in Greek mythology and this is interpreted in story through making her something called the 'Muse of Space.'

Calliope is the name of a female character in Francesca Lia Block's novels Ecstasia and Primavera. These works are heavily influenced by myth.

Calliope is the name of the daughter of Kratos, the protagonist of the God of War video game series.

Calliope is a character in the novel Middlesex by Jeffrey Eugenides.

Calliope is a character in the graphic novel Sandman, by Neil Gaiman. Her story is in the collection Fables & Reflections. According to the comic's canon, Morpheus was actually the lover and husband of Calliope, and the father of Orpheus. In another deviation from the traditional myths, Calliope is stated as being the youngest of the nine muses, rather than the eldest.

A magical woman named Calliope acts as a Muse for the protagonist of the novel Fool on the Hill by Matt Ruff. Though she is never explicitly said to be the Calliope of Greek mythology, she is immortal, magical, and is described as enjoying retsina and feta, both Greek foods.

This is the real name of Dr. Callie Torres on the medical drama Grey's Anatomy.

Calliope, the muse of epic poetry, was the ironic name Jeffrey Eugenides called his narrator in his novel Middlesex.

In the Rogers and Hammerstein version of "Cinderella" Calliope is one of Cinderella's evil step sisters.