However, Ugo chose to live a mortal life and fell in love with Ayla; Ugo left Belli Castle when he was around 34 years old and married her, much to Lorenzo's disappointment. Lorenzo was dismayed by Ugo abandoned his mission, as the alchemical truth he had ultimate conviction in had been defeated by something as worthless as "love". In response, Ugo hastily created Riccardo Belli to continue his mission.
2 years after leaving Belli Castle, Ugo and Ayla had a daughter named Fiona. Despite being a homunculus which are usually infertile, Ugo and Ayla were able to birth Fiona due to his possession of the Azoth. Fiona also inherited a birthmark from him.
18 years later in the present, Riccardo murdered a 54-year-old Ugo after attempting to kill him in the car crash as revenge for leaving the castle and passing the Azoth down to Fiona.
- Upon examining wine in the castle's pantry, Fiona mentions that her father "was quite the wine connoisseur."
- By technicality, Ugo is Lorenzo's son and Riccardo's brother.
- Physically, Ugo appears much older than Riccardo due to not having used the Dry Method.
- From the ages given, Lorenzo had created Ugo at the age of 36 (90 - 54 = 36). Coincidentally, Ayla also gave birth to Fiona when Ugo was 36 (54 - 18 = 36).
- He has a conversation with Ayla in Endless Zero.
- Ugo is killed by a sharp blade, a possible reference to the death of Philip Hamilton in Clock Tower 3. Ayla dying in a car crash may be a throwback to Nancy Hamilton dying in a car crash.