In the context of the series, "Himekishi" refers to a "Princess Knight"—a female noble who arms herself as a knight and fights rather than remaining a helpless damsel. Lilia's "lifestyle" within the narrative is defined by this transition from a royal protector to a captive subjected to magical corruption to fuel her brother's power. Note on "Useful Paper":
LILITH-IZM 06 Digital anime with Lily & Lilia: Another Story Lifestyle & Character Information himekishi lilia uncensored