Juno in the 12th house could point towards having a soulmate relationship (could be platonic) in this lifetime or a relationship based on spirituality.
Juno in the 12th house means that you want a partner who will unlock your unconscious self as well as your intuition. The 12th house is all about the hidden self. You’re looking for a partner who truly represents this unconscious side of you.
With Juno in the 12th house, you probably have really deep, subconsciously based relationships. It’s almost hard to define exactly what the relationship is. However, you may find that you almost merge with your partner; this is how you best work through your issues. Juno in the 12th house can also indicate a past life karmic bond with your partner. These relationships can be painful or confusing at first, but they ultimately push you to grow.