Learn Danish: Skurken forsøger at dræbe modige Venus. - The villain attempts to kill brave Venus.

When an adjective describes a proper noun (like a person's name), Danish usually drops the free definite article (den or det). You can say den modige Venus, but it sounds extremely emphatic or like the style of a fairy tale or epic poem. In normal contexts, we just drop den.

Wait, if there is no den, why does the adjective still end in -e?

Because proper nouns are inherently definite! Even though the article den is omitted, the adjective must still match the definite status of the name Venus. Therefore, the basic form modig gets the definite -e ending to become modige.

If the adjective was describing the villain instead, would we also drop the article?

No. The rule for dropping den or det only applies to proper nouns. If you wanted to say 'The brave villain', skurk is a regular noun, so you must use the free definite article and drop the suffix: Den modige skurk forsøger at dræbe Venus.

Is there any difference between using forsøger and prøver in this sentence?

Both translate to 'tries' or 'attempts' and use the infinitive marker at. Forsøger is just slightly more formal and written than prøver. In a dramatic sentence about a villain (skurken), the slightly heavier word forsøger fits the tone very well, though prøver would also be perfectly correct.