Roxy Migurdia, a member of the long-lived Migurd tribe, was born without the telepathic Nenwa ability, estranging her from her kin and compelling her to master verbal communication. Inspired by a wandering magician, she departed her village to pursue magic and adventure. Her early journey led her to join the Rikarisu Gang, though the group disbanded after the death of member Dale. A referral from explorer Bloody Kant secured her enrollment at Ranoa Magic Academy, where she trained under Jinas Halfas, ascending to the rank of Water Saint through mastery of water magic. Post-graduation, she became a traveling tutor and accepted a pivotal role instructing Rudeus Greyrat, son of Paul and Zenith, profoundly shaping both their lives over two years.

Her youthful appearance mirrors a teenager, featuring pale skin, long blue braided hair, and vivid blue eyes that shift to green in sunlight—a trait often misattributing her to the feared Superd Tribe. She dons a magician’s hat, initially gifted by Kant and later replaced by Rudeus and Sylphy, paired with a robe-and-skirt ensemble. Despite her petite frame, she is an adult, a fact frequently overlooked by others.

Calm and intellectually driven, Roxy balances self-critical reflection with a history of defiant choices, such as challenging her academy mentor. Interactions with Rudeus tempered her earlier arrogance, fostering humility. Insecurities about her stature and lingering childhood fears of Superds contrast her romantic idealism, including a cherished fantasy of meeting a destined partner in a labyrinth—a scenario realized when Rudeus rescued her during the Teleportation Labyrinth crisis. This event culminated in their marriage, positioning her as one of his three wives.

After the Teleport Incident, she assisted Paul in cross-continental survivor searches, collaborating with allies like Elinalise Dragonroad and Talhand. Her efforts faced obstacles such as Hitogami’s interference and guidance from demon emperor Kishirika. The spin-off comic "Roxy is Also Serious" expands her adventures, underscoring her narrative prominence.

A specialist in water magic, Roxy employs chant reduction for swift spellcasting, wielding abilities like Frost Strike, Ice Spear Blizzard, and the defensive Earthen Bastion. She crafts advanced magical scrolls and adapts tactics for close combat. Strategically minded, she seeks Elinalise’s counsel to navigate marital dynamics.

Notable trivia includes her veneration as the Goddess of Wisdom in Rudeus’s personal faith, with her undergarments enshrined as relics. She favors sweet alcohols discovered in Kurasuma Town, rejects bitter drinks, and avoids green peppers. In timelines absent Rudeus, she mentors Sylphiette and remains unmarried. Her legacy spans teaching at Ranoa Magic Academy and serving as former court magician to the Shirone Kingdom.