Rule for feminine · die
Words for women (and “Person”) are always die.
In German, nouns that refer to women follow natural gender and are almost always feminine: die Frau (woman/wife) and die Mutter (mother) are clear examples. There's also a neat grammatical quirk: die Person stays feminine even when you're talking about a man - “er ist eine interessante Person” is correct German, because a word's grammatical gender doesn't change with the sex of the person it describes. This rule covers only 0.3% of frequent nouns (8 words total), but within that small group there isn't a single exception, so you can trust it whenever you're talking about a woman or using the word Person.