Jehan-san,
Gorka's assessment is correct is in alignment with my own. While I am not an alchemist, after my own study, it appears that the raw cherries were enchanted and not alchemical in nature; once a raw cherry was imbibed the enchantment had immediate effect. Antidotes had no effect upon the enchanted individual. Once the initial event/ enchantment passed, it did not have a continual affect upon the individual.
With regards to the All Cherry Spirit, it was apparent that the spirit was bamboozled (I believe that is the surface world term). The spirit was manipulated, led, and imprisoned within the tree using aspects of its own personality/ self. The All Cherry Spirit manifested its desire for help by projecting its own rage via enchanting the cherries it produced. In my assessment there may have been alternate methods that may have been more efficient at eliciting a helpful response, however, it did appear to have the intended effect in attracting the attention of the adventuring population.
We did find some additional items of note around the tree itself which were provided to Sera Fallingstar-san. If you wish additional information, you may contact either her or myself directly.
In either case, it does appear that there are many "odd" occurrances regarding the flora and fauna of the land, of which I am of the assessment that they are related directly or indirectly to what we found. I do encourage everyone to be mindful and observant to any other "oddly" enchanted flora or fauna, and also strongly encourage individuals not to disregard this omen outright.
May the Light guide you and may Shadow guard your path.
Arcanist Dure'dhel
Warlock of the Royal Celestial Guild of Gaden