笹木咲(冬服)
The fourth [[official alternate costume|costume]] of [[Nijisanji]]'s [[Sasaki Saku]], as seen in example post #4353608. This is her winter dress, chronologically her fifth if taking her [i][[Sasaki Saku (Valkyrie Hero)|Valkyrie Connect]][/i] outfit (her actual fourth rigged outfit) into consideration.
sasaki saku (4th costume)