Swimsuit Archer-class version of Barghest (Fate) introduced in Fate/Grand Order's Servant Summer Festival! 2023 event. She is also known as UDK-Barghest in her first ascension, with UDK standing for "Union Defence Knights".
Instead of using this tag, tag her specific ascension:
To search for all ascensions simultaneously, use {{Barghest_(Swimsuit_Archer)_*_(fate)}}.