The Fate/Grand Order 5th Anniversary stream has given players a glimpse at upcoming summer Servants and costumes in Fate/Grand Order‘s Japanese client.
Full disclaimer, these costumes will currently only be available to the Japanese client of Fate/Grand Order for now.
They will more than likely arrive on the global client of Fate/Grand Order sometime in the future.
Fate/Grand Order’s global client currently has a summer festival underway.