Though this is not a uniform you can unlock for Artoria in Fate/Extella Link ... to how Nero does in her Olympian Bloomers Spiritron Dress in Fate/Grand Order.

Lasengle announced the summer Servants for Fate/Grand Order 2023 on the Japan server. Artoria Caster will ... and Tristan—will also get Spiritron Dresses. You’ll be able to exchange for ...