It is used to describe someone as overwhelmingly positive on the outside, seeming as if they're perfect. However when you get to know them better, they are actually pretty depressing inside.
Cinnia: "Woah, xxx is so cool, he so intelligent and emanates positivity, he's my angel."
Emma: "Nah, when you get to know him, he's actually just a Leal, but he's still fun to be around."
It refers to the Latin or Scottish word for loyalty and honesty. It can also be used to refer to people with a dashing face and those who are good at singing.
Cinnia:" Oh my gosh, Leal is so cute and is so good at singing, I want him so bad."
Emma:" For real, he would be the perfect bf, he's such a Leal!"