تِلْكَ الْفَتَاةُ حَاضِرَةٌ.
Translation: That girl is present.
تِلْكَ: indeclinable feminine demonstrative in nominative position; its kāf marks address. الْفَتَاةُ: nominative apposition. حَاضِرَةٌ: nominative predicate.
The feminine form refers to the girl, while the kāf concerns the addressee.