Nobunaga is often depicted in naked cape as a result of a running gag in Koha-Ace about how she would occasionally "feel hot", referencing the real life counterpart's death during the Honnouji temple incident. This was later elaborated upon in a more symbolic meaning in Fate/Grand Order (where this specific "outfit" is available as her final ascension art) as being her "accepting" her death and giving up on her honor and power that she can't take to the afterlife.
