That is certainly an choice in terms of weaponry, though he is not one to talk. He keeps an eye on her, ready to assist or defend her if need be.

The first attacker goes down under Alice's assault - it seems a blow to the head is a blow to the head, regardless of dimension. As Sigma takes hold of the first one and floats her out of danger, the second one leaps to her feet and howls in rage, transforming her arm into a sword and charging towards Alice, intent on trading blows.