A trollsona is a troll persona; “the profile of a fictional troll which [one enjoys] pretending to be.” Similar in concept to a fantroll and popular among fans of Homestuck, it is naturally an idea that appeals strongly to Calliope in particular.
In Homestuck[]
Calliope's trollsona named Callie Ohpeee whose “unusual name” was apparently characteristic of members of the lime caste - however Calliope's cherub lime blood does not truly match the color usually associated with lime blood among trolls. She has nearly filled a hard drive with artwork related to the character, and it is in this form that Calliope chooses to meet the human Roxy Lalonde for the first time in person. Later, Calliope helps Jade Harley and Jane Crocker create their own trollsonas as well.
In Homestuck: Beyond Canon (Dubiously Canon)[]
The “first and last WORLDWIDE INTERSPECIES ROLEPLAYING SESSION” was held on Earth C sometime before Dirk Strider's departure on the Theseus, who participated alongside his children Dave Strider and Rose Lalonde - the latter of whose trollsona closely resembled Kanaya Maryam's initial vision of an Alternian Rose. Dirk's trollsona was “a highblood”, but he refrains from introducing the character in any further detail.