Your allies are the key to your victory in Metaphor ReFantazio, and Hulkenberg teaches you so early on. She embodies the virtues of the Knight, but that doesn’t necessarily make it the best Archetype for her.
Unlike Persona, you can swap your party member’s Archetypes in Metaphor ReFantazio. Hulkenberg is quite a sturdy tank, and her Knight lineage helps her withstand deadly blows and draw aggro from enemies.