This sounds fine, soothe the creatures! Perhaps not too many of them at the same time (let's say, if they're three or more, the 'thrall' is no longer as efficient when exercised on the creatures, or it's fully broken).

The creatures don't have human-like memories or communication systems, though they possess higher-than-expected levels of intelligence. They might be able to share with Vanessa just a very quick mental image of the now defunct Beastmaster, siccing them on the Huntress' trail with instructions to rip her apart.