@Liquidxlax
Yeah, this makes me really curious.. the 'magic' in this world is not well defined, but we do know about techniques and Arcana.
She may either be a being capable of magic, a mutation from some kind of experiment or it's a natural character of a dryad and that they existed prior to anything already.
She does, however, seem to be capable to converse with all plant types to gain info; something that the other creatures do not portray and the humans have feared them for, putting them into the brink of extinction.
And can mate with any creature, albeit only give birth to variations of fauna.
So I have my doubts that dryads are product of some curse/experiment/alchemy/homunculus attempt.