There needs to be a tag for semi-transparent weapons, especially magic ones. Because if you look, the one in her hand is transparent enough to see her finger through it. Come to think of it, Nightblades of ESO's era in the timeline probably had one of the earliest forms of bound weapon spells since they conjured red ethereal magic blades at will in combat.

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Just because someone isn't carrying visible weapons doesn't mean they're an easy target. They may know unarmed combat styles, they may have combat spells, or both. Anurri falls into the second category; as a Nightblade her combat spells can offset times when she's otherwise unarmed. So she's dangerous with or without a weapon in her hands.

Though her combat spells do largely rely on her endurance, and as such she is classified as a "Stamina Nightblade".