The first word which comes to my mind when describing character relationships in HBO'S Game of Thrones is complicated. Even though it is much simpler than in the books, it is quite hard to remember who killed whom, or which brother-sister pair is currently in a sexual relationship.
This poster should help untangle some of the relationship mess (even if the data it is based on is not relevant any more after the last season aired).
If you are interested in the thought process behind creating this poster, check out my other post!