Unarmed, and people will talk of sabotage. Knives, and the victor will be a backstabber. And he has more experience with dueling blades.
And I'm not revealing sorcery on Sei's word.
[X] Short blades. The guards are armed with those weapons, and you're pretty sure you could borrow them. You could use them with Viper Style, and you're pretty sure none of those weapons could be rigged.
Not as good as knives for our style, but it's better than the dueling blades, and with better implications.
Also, it does occur to me that deities CAN bless favored combatants for a scene, gifting quite a bit of power. Innocent or no, if he has the support of a deity, he could get quite a boost. We should be careful, locked Jade Prison or no. So again, no dueling blades.