This is the 5084th most frequent Swedish word.
christina
"Christina" is a female given name in Swedish.
Here 'Christina' is used as a proper noun to refer to an individual's name, serving as the subject in the sentence.
Christina är en fantastisk vän.
Christina is a fantastic friend.
In this sentence, 'Christina' again functions as a proper noun, being used as the object of the sentence to indicate a specific person the question is about.
Har du sett Christina idag?
Have you seen Christina today?
Here 'Christina' is used as a proper noun representing the name of an individual, serving as the actor performing the action presented in the sentence.