You are truly a good person.
'Proprio' = PRO-prio, stress on first syllable. 'Bella' = BEL-la.
Use this as a sincere character compliment, not a physical compliment. 'Bella persona' means a good-natured, kind person — it is about inner quality. It is one of the highest Italian compliments you can give someone you have just met.
In Italian, 'bello/bella' does not only mean physically beautiful — it has a very broad positive meaning: 'bella persona' (good person), 'bella idea' (great idea), 'bel gesto' (kind gesture). Context always disambiguates. 'Proprio' intensifies: 'truly/really'.
Hai un cuore grande.
You have a big heart.
'Avere un cuore grande' is a warm Italian idiom for generosity
Si vede che sei una persona genuina.
You can tell you are a genuine person.
'Genuino' — authentic, unpretentious — highly valued in Italian culture
Sei una persona rara.
You are a rare person.
Implies exceptional quality — very high praise
Italians are generally not reserved about expressing positive feelings and compliments. Telling someone they are 'una bella persona' is a genuine and meaningful statement — not flattery. Italian culture values 'genuinità' (genuineness) and 'semplicità' (simplicity of character) as core virtues.