You should add tag 'Charlotte', she is in the upper corners.
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Noble Phantasms:Gate of Battlefields: The Witches' Arsenal
Tiro Finale: Romance of the Grand Battleship Cannon
1a) Reference to Gilgamesh (F/SN)'s Gate of Babylon.
1b) The original reads "Gate of Battlefield". I changed it to the plural for grammatical reasons.
2) Meta-reference to Gundam.