Brutalist said: No, he means Th 14, Double Dealing Character.
Well she does pop up in Hopeless Masquerade as a background character but let's not dwell on that.
In all honestly, I was expecting another "Sakuya-cosplaying-as-another-character-to-display-her-desperate-insanity" but this is good news for her. And it fits as well since (besides Youmu, Eirin, Tenshi, Shou, Miko, and whoever I missed) Sakuya does wield weapons.