The Page of Cups in the Mother Tarot deck is the empath: the soul who is able to easily sense the feelings of others, and also transfer that emotional energy via the power of grounding.
Sensing is the easy part. Sifting emotions through the cleansing waters of the body—back down into the earth to be reborn as new thought energy—takes considerable practice and skill. This princess understands that life brings surprising feelings for everyone, rendering their actions sometimes unpredictable. For purposes of health and safety, she's able to conduct her own emotions, and soothe the emotions of others to some degree.
She comes to your side when this card is drawn in a reading, in her own form or another.