Username: It'sTuesdayAgain...
Name: Riot
Age: 3 years
What horse is she based off of: Ruffian - (Reviewer x Shenanigans; b. 1972, d. 1975).
Picture of this horse:

What she is known for: At almost 17 hands tall and jet black, Ruffian is considered by many to be not only one of the greatest race fillies of all time, but one of the best racehorses of any gender of all time. Ruffian made a total of 11 lifetime starts, winning all but her final, and ultimately fatal, match race against 1975 Kentucky Derby winner Foolish Pleasure. Prior to her final start, she had won over varying distances(from 5 and a half furlongs to a mile and a half), had set new or equaled existing track records, and won the 1974 Eclipse Award for Outstanding 2 year old Filly.
During her final race, Ruffian hit the starting gate with her shoulder at the beginning of the race, but despite any discomfort she was in continued to run, and maintained a small lead over Foolish Pleasure. But very suddenly and shockingly, she snapped both sesamoid bones in her right front leg. Her rider, Jacinto Vasquez, tried in vain to pull her up, but she refused and continued to run on the severely damaged leg. Afterward, she underwent surgery to repair it, but upon waking up from anesthesia she began to thrash wildly, undoing all repair work that had been done to her, along with creating even further injury. She was humanely euthanized a short time after. Ruffian is buried in the infield at Belmont Park in New York.
Ruffian was inducted in the Racing Hall of Fame in 1976.
Information gathered here