Cygames will add the Summer Maruzensky and Special Week swimsuit alts to Umamusume when it updates this evening, and shared details about the two new three-star Trainees and SSR Support Cards for Speed Sweep Tosho and Stamina Winning Ticket. Those banners run until October 27, 2025, as does the Beaches, Bathing Suits, and Blazing Trails event.
While these are alts that are different cosmetically, have adjusted Growth rates, and feature different skills, they are also similar to the original versions. So Maruzensky is still a Front Runner who is best at the Turf Mile races, but can handle Sprint and Medium, but this time it is easier to make her viable for Dirt races too. Special Week is still best at Medium and Long Turf races and is a Pace Chaser or Late Surger, but you can also prepare her for Mile runs and the End Closer strategy. Maruzensky starts with the A Kiss for Courage Unique Skill that helps increase her Velocity, though she can also pick up some that help restore Stamina. Her growth rates are 15% in Speed and Wit. Special Week’s Unique Skill is Dazzl’n Diver that recovers stamina after two other skills activate, and her other Potential Skills tend to focus on increasing Velocity.
Here are the Umamusume infographics for both Summer Maruzensky and Special Week:


With the two new SSR Support Cards, it seems like the Stamina Full-Blown Tantrum: Winning Ticket could be the most useful. It doesn’t offer Specialty Priority, but does offer Mood Effect and Stamina bonuses and the Hard Worker Late Surger passing skill. The Speed It’s All Mine: Sweep Tosho card does have Specialty Priority, an Initial Speed bonus, and a Friendship and Speed Bonus. Its unique skill is Crusader for End Closers.
Both of those infographics can be seen here:


The last update added chapter 4 of the main campaign and Gold City as a trainee.
Umamusume: Pretty Derby is available on PCs and mobile devices, and the Summer Maruzensky and Special Week swimsuit alts focus banners run until October 27, 2025, after which they join the general pool of characters. Likewise, the two new Support Cards also will always be available after their debut.