well, the purple-haired lady from the 2nd Cour preview i, the kanji below her says "mysterious New Teacher (
kyoushi), Ku-ro-u (or maybe Ku-ro-ku, its hard to tell the kana apart) - Ursula says 'Ku-ro-uh' with disgust just after.
And hey, unrelated but is this an Attack on Titan shoutout in the 2-cour preview?
Looks to me like Ursula kicked the teeth out of a titan