Floats passively until disturbed. When engaged, it will reveal its fangs and dive at the Knight in a parabolic arcing motion, dealing damage on contact. They are extremely fast and frantic, making them hard to fend off despite their low health. Because of this, it is advised to stand still and let them come closer themselves, as their seemingly unpredictable movement makes it hard to pursue them.
Longnail, Mark of Pride, and Quick Slash can be quite useful against them. After two nail upgrades, they can be killed in one hit, making it significantly easier to deal with them.