This is hard for me to describe.

Don't know if I'd be good at this.

(Sorry, I had to look off some answers to give me ideas. Trying to attempt giving helpful advice.).

Beautiful is something that a person would find unique about you. Being what describes you as an individual. Not having the likeness of any other, with a mindful and nurturing intuition.

The beauty in that person would be that they are the most understanding. Not letting anyone's opinion tell them different about you. Someone who would never doubt your own existence.

(The last sentence didn't really make any sense)