Siobhan is the youngest daughter of Thancred and Melody Alveron. When she was less than a year old her mother left them to ascend to godhood, leaving Thancred devastated. Emotionally unable to care for an infant at the time, he entrusted Siobhan into his grandparents' care. The little tiefling was primarily raised by her great-grandmother Valwyn, although Thancred still did his best to visit and send letters. Valwyn instilled a love of nature in Siobhan at a very young age, leading her to become a ranger.

Siobhan always knew that she wanted to follow in the footsteps of her family and join the Harpers someday. However, before she joined she decided to travel the Sword Coast on her own for a year to gain some life experience. While traveling, she bonded with a Beast of the Earth named Atlas who took the form of a giant badger and quickly became her closest friend. Soon after she met a young elven girl named Delina, and the two of them eventually formed a relationship. After her year of adventuring was over Siobhan was officially inducted into the Harpers.

She's a very happy-go-lucky character and always tries to see the bright side of things. She loves nature and animals, and if she's not running her tavern she's probably sitting outside in the garden.