Florianna

Florianna the Love Queen can be found in an area to the right of the Crime building in Aquarium City if you have the "BLOOD" secret code on. What first appears to be a nice smelling flower turns out to be this sentient plant's genitalia.

By bringing her empty bottles, she can fill them up with her love nectar, which can then be consumed to increase a character's maximum HP.

Despite sentient plants being mentioned in Book 1, this is the only time in the game that the party can interact with one.