Gangster and another gangster? you call it simply gangster relationship.
Besfriend and your best of friends? you can name it as mutual relationship.
Stranger and another personality (nerd, introvert, smart, wise, genius, etc.) ?let us say it is a destiny.
How about an enigmatic person meeting an equally mysterious person? and how about a mystifying person being too independent with another cryptic person?
would it be equivocal for you to judge having lot of choices but with 2 prevailing 2 judgments?
1. an enigmatic person + a mysterious one = ambiguous relationship
2. mystifying person + cryptic one = ambiguous relationship
Which of the 2 choices has an anaclisis relationship?