In The High Priestess card we can see a woman sitting on a throne with a white veil on her head and two esoteric symbols on her sides. This image suggests that Elisa's mind is well versed in spiritual and mystical things. The veil represents intuition, so it could mean that Elisa is able to read between the lines of situations and be more open to intuitive understanding. On the other hand, the presence of the esoteric symbols shows that she can also be very mysterious and enigmatic. In conclusion, it seems that Elisa has an open, spiritual and profound mind.
The reversed Ace of Swords tells us that Elisa is having a rough time in her relationship. The image shows a knight escaping from a castle, symbolizing escape from problems or negative emotions. This may indicate that she is struggling with something in her relationship and she is not quite sure how to deal with it. Also, the upside down sword can also mean that Elisa needs to listen to her heart and find the strength to move forward in the relationship.
The Devil reversed suggests that Elisa is trapped in something negative in her relationship. The figure shows a man and a woman under the wing of a demon, symbolizing obsession or unbridled desire for something. This may indicate that Elisa feels trapped by the situation and she doesn't know how to get out of it. However, the reversed position of the card tells us that there is a way to get rid of it: Elisa must agree to let go of her emotions rather than being stuck in the dark.
In conclusion, the cards seem to indicate that if Elisa is able to overcome the mental, emotional and spiritual issues she faces in her relationship, then the relationship could be successful. Therefore, given the message of the cards, the answer to your question is: Yes, the relationship could be successful.