Diego is a young woman of below-average height and slim to medium build. She has light hair, dark eyebrows, and light, sharp eyes. She commonly wears an equestrian helmet with the letters "DIO" loosely mounted on bending pins emerging from a small ribbon tied at its front, a turtleneck jumper patterned with a diagonal grid, light, mid-forearm-length gloves, jodhpurs with flared hips, and tall, dark riding boots. After obtaining the Corpse's left eye and fusing it with her own, her left eye's iris has the word "TURBO" engraved on it, and she temporarily gains a mark under said eye reading "DIO", contrasting to the cross Gyro gains from the right eye.

Personality During her childhood, Diego was a good-natured and resourceful kid.[6] Her mother raised her with love and taught her to keep her dignity in even the direst situation. At age five, witnessing her mother sacrificing her hands so that he could be fed, Diego developed a resentment of everyone around her for allowing that to happen, and an insatiable ambition.[7]

Since then Diego has been driven to climb the social ladder in order to get back at everyone who wronged her in the past. Upon hearing about the Corpse, she first sought them for herself and as soon as she found herself in a disadvantageous position with a crippled horse, didn't waste time in proposing her services to Funny Valentine, demanding mayorship of Manhattan in exchange for her participation.[8]

She harbors a grudge against her biological father Dario, and was ready to cooperate with Hot Pants when she proposed to tell him about his whereabouts.[9]

Using any opportunity, she is said to have married an old woman for her wealth,[10] and in the same vein, participated in the Steel Ball Run for prestige. Diego is particularly vindictive against anyone who gets in her way, and doesn't hesitate to injure or kill them, although she doesn't manifest murderous intents automatically. For instance, at one point during the race she warns Gyro to stay away from her as the latter tried to attack him.[11]

Diego possesses a strong misanthropy, describing humanity as a "flock of pigeons", and resents humans as a whole for the death of her mother.[12] Thus Diego is naturally solitary, never looking to bond with anyone, and in case she has to cooperate with someone, she will keep a certain amount of separation between them. Diego sees human life as worthless and will sacrifice anyone to further her goals without hesitation. For instance, she allowed Wekapipo to be killed by D4C's ability in order to escape.[13]

ABILITIES/STAND(Scary Monsters) Diego first turned into a dinosaur after she, along with a number of villagers, were controlled by Dr. Ferdinand in order to steal the left eye of the Saint's Corpse from Johnny and Gyro. After Ferdinand was defeated, Diego stole the corpse part and fused it with her left eye, allowing her to retain the ability to turn herself into a dinosaur.[14] While initially benefiting from just enhanced senses and strength, the Stand and all of its abilities eventually became her own.[15] Scary Monsters (スケアリー モンスターズ)

Debut SBR Chapter 28 Type Range Irrelevant, Integrated, Phenomenon, Shared Ability Dinosaur Infection Cry USHAAAAAA ... ! PWR B SPD B RNG D STA A PRC C DEV B

HORSEBACK RIDING Diego is one the most talented jockeys of her generation, and is considered one of the favorites of the Steel Ball Run. Diego's skill allows her to ride across many types of terrain and she is able to use advanced techniques such as riding close to others as to use their horse as air pressure shields to get ahead in a race. Moreover Diego possesses an uncanny talent for analyzing horses, notably having discovered Gyro's horse Valkyrie's ticks and weakness to exploit them, and being able to not only assert her horse's capabilities, but also that of other horses. Her enhanced senses as a dinosaur allow her to analyze horses but also the terrain in order to secure the victory. Her original, beloved horse is named Silver Bullet. Silver Bullet (シルバーバレット)

Debut SBR Chapter 5 Type 4-year-old Arab Thoroughbred