Roxine serves as a summoned maid under Cayna's command, her system-registered age listed as 21 years. She possesses auburn hair and red eyes. Performing housemaid duties involving daily caretaking, she also excels as a rearguard-oriented thief specializing in dual-wielding daggers, with a base level of 550. Cayna later provides her with an additional weapon, the hatchet "Tragic Night: Jason Blade."

Cayna, whom Roxine serves primarily, refers to her by the nickname "Cie." Roxine maintains a consistently antagonistic relationship with her counterpart, the butler summon Roxilius; the two frequently exchange insults, demonstrating notable friction. Conversely, she shows kindness toward Luka, the child under the shared care of herself, Cayna, and Roxilius. Luka also uses the nickname "Cie" for her.

Roxine originated as a special reward Cayna obtained using summoning bells. These bells were awarded for achieving exceptionally high playtime milestones—one bell per 10,000 hours played. Cayna possessed at least two bells, enabling her to summon both Roxine and Roxilius.

A narrative difference exists between story versions: while Roxilius accompanied Cayna, Luka, and Lytt to Felskeilo for a festival in the original web version, Roxine takes his place for this event in the subsequently published version.