In Umamusume, the Godolphin Barb refers both to one of the Three Goddesses of the Umamusume universe as well as a training AI based on her, who is one of the hosts of the Grand Masters scenario. She represents "Love" and is represented by the color blue.
A horse girl, she has long blue hair and blue eyes. She wears a blue track jacket and black shorts as well as ear covers. She has an accessory on her right ear.
She is based on the Godolphin Barb (or Arabian), one of the foundation sires of the Thoroughbred breed of horses. His umamusume's blue theme is likely based on the Godolphin stable's royal blue racing silks. Through Matchem, he is the sire-line ancestor of about 1% of all Thoroughbreds. Even of all that, the overwhelming majority of living descendants are through Man O' War. In the context of Umamusume, he only has Calstone Light O as a real-life descendant. Otherwise, Oguri Cap would come the closest as the real horse's damsire (Silver Shark) is also of that sire-line.
