The snake is sort of weird.
It's big enough that anyone with the strength to manifest it ought also to have the finesse to control it, but instead it appears to be rampaging, which makes its weirdness sort of secondary to the fact that there is a giant snake with a mirror for a face thrashing around.
Idaia isn't especially scared. She had a dream last week about a roomful of mirrors being destroyed, so she should be able to do some damage and maybe get the thing locked down.
It isn't a surprise either, exactly, when the head swings towards her and her sister--
It's definitely a surprise when bracing for the impact does exactly nothing because no impact occurs.