There will be an air of intensity when you're together as this person pushes you to confront the deepest, most complex and potentially frightening issues in your life. Their methods of ferreting out your deepest buried emotions will probably be pretty uncomfortable for you. You could have arguments over your differing viewpoints, or you'll fight if you don't feel like obsessing about these things all the time.
But still, you'll feel compelled to do it, as if your time together would be wasted on mere small talk or superficial communication. This aspect could have a positive effect in the end, if it encourages transformation to a higher mental plane or a higher level of self-awareness. This person might try hard to have control over your mind and thoughts, which would really push this influence to its limits. You should try to give each other and yourselves a break from time to time, because this kind of influence will wear you both out if you're not careful.