She only appears in 1 episode

An Umamusume with an unbreakable spirit, King Halo is ready to overcome any challenge in order to be recognized by all as a first-class lady. Despite their strained relationship, she hopes to one day be recognized by her mother—a first-rate Umamusume and designer—and prove herself as a daughter. Yet to her gaggle of admirers at the academy, there's no doubt in their minds that she's already worthy of the title of "King," and they do not hesitate to regularly hail her as such.