This is the 2824th most frequent Swedish word.
alessia
"Alessia" is not a Swedish word; it is typically a given name.
In this sentence, 'Alessia' functions as a proper noun referring to an individual's name.
Alessia är en vänlig person.
Alessia is a kind person.
Here, 'Alessia' again is a proper noun, representing the name of a specific individual mentioned in the context.
Vi såg Alessia på festen igår.
We saw Alessia at the party yesterday.
In this instance, 'Alessias' is used in its possessive form to describe something that belongs to Alessia, which is her smile in this case.