Hi Mandy! I'm all about helping take a plot-vacuum to the cobwebs!
Siri here gives everyone the benefit of doubt to a fault. She has no feathers to ruffle, jokes at her expense and arrogance tend of go over her head right now, but she is starting to become more familiar with human social ques, so that may change. For now, if he's well meaning and plant like him, she probably will too!
Nothing comes to mind immediately as far as specific lines go. There is a creepy shadow thing a few characters have spotted around the wishing tree, though, so she may go looking for him for a second opinion about how to protect it, or whether she should be concerned. Green thumbs consultation and such. Other than that, tossing them together works great. :D