Hmm, "beautiful" is so subjective. Scientifically, facial symmetry is a large factor in a person being regarded as physically attractive. Men and women are generally hardwired to find certain traits (linked to fertility and ability to provide for a family) attractive. But for me, there's a whole bit in the Roald Dahl book "The Twits" that pretty much sums it up. How a person who's physically attractive but has an unpleasant personality becomes ugly, and how a physically unattractive person with a wonky nose and crooked teeth :tongue2: but with a nice personality becomes infinitely more beautiful.
So I'll say kindness, thoughtfulness, and empathy.
To me - being beautiful is something that comes from inside. A beautiful person to me is someone with great, great compassion for humans and animals, someone who is genuinely kind and loving, and someone who is completely trustworthy. :heart2: