Mihono Bourbon

Mihono Bourbon from Umamusume is indeed also known as "Cyborg." This nickname comes from her real-life horse counterpart, Mihono Bourbon, who was known for his incredibly consistent and machine-like running style due to intense training. This consistency led to him being called a "Cyborg." In Umamusume, this is reflected in Mihono Bourbon's character design and personality, where she often perceives things numerically and carries out objectives in an expressionless, robotic manner, despite having feelings underneath. Her futuristic/robotic design in the game also plays into this nickname.