This is the 6005th most frequent German word.
christa
"Christa" is a German female given name, derived from "Christ."
Here, 'Christa' is used as a proper noun, referring to a person's name.
Christa geht jeden Morgen zum Bäcker.
Christa goes to the bakery every morning.
In this sentence, 'Die Christa' uses 'Christa' as a proper noun but adds an article for stylistic emphasis in informal conversation.
Die Christa, die wir gestern getroffen haben, war sehr freundlich.
The Christa we met yesterday was very friendly.
'Christa' here denotes the person's name, used as the subject in the sentence referring to an individual's hobby or interest.