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| Description | Before starting the investigation, the Proxy must first complete a Solo Investigation of the area with the designated Agent. In Solo Investigation, the designated Agent will help you master the area’s unique mechanics and apply them in combat across different areas. Complete Solo Investigation to unlock the Joint Investigation for the area. |
idk about Promeia synergy, but i plan to use her with Nangong Yu (or Vivian sometimes) and Yuzuha.