nigekiri sisters (umamusume)
Three-person idol "umadol" unit from Umamusume. Consists of the members Smart Falcon, Silence Suzuka and Mihono Bourbon, with Falcon leading the group. Later on expanded to five members with Ines Fujin and Maruzensky joining the Sisters.
All five members of the group specialize in the "runner" (nigekiri) pacing strategy during uma races, hence the name. The name of the group is sometimes translated as "Runaway Sisters" here on Danbooru.
The Sisters have their own 'uniform' outfit consisting of a pink-and-white striped sleeveless dress with a yellow bodice-skirt (resembling a miniature tutu) worn on top. They also wear the Umamusume starting future in their performances.