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Romario is a member of the Chiavarone Famiglia and the right-hand man of Dino. He has black hair, is normally seen smiling, always wears a suit, and wears glasses. He is shown with a white tuft of hair in the Future Arc. He was first seen when Dino was tutoring Hibari, and became fast friends with Kusakabe.
Romario is first seen in a flashback with Dino's Father. After that, he is briefly seen every now and then alongside Dino when a problem arises or an event that requires Dino to be composed occurs.
Romario is momentarily seen accompanying Dino for the Ring Battle.
Romario is seen greeting Tsuna as he comes home, ushering him in the house. Later, Romario is seen in the city, pulling Dino up from the ground and telling him that they were staying in the same hotel as the Varia.
- Romario is almost always the subordinate that Dino has around to stop him from being so clumsy.
- In the future, Romario and Dino trained, so that now, Romario or one of Dino's subordinates can now be 1km away from him without him being clumsy. It is shown that this still needs refinements as Dino still falls down the stairs when Romario is just mere meters away.
- He appears dining in a restaurant during Gokudera's past story flashback. The reason is unknown.
- Yamamoto calls Romario, "Old Timer."