I have made a relationship map which I think has summarized the situation at the start of each episode.
Blue circles mean the people have mutual bonding, strong emotional attachment or trust.
Green boxes mean leagues, based on mutual interest. They can break easily given enough incentives.
Blue arrows mean the person have stronger emotional attachment for the receiver, but the receiver reciprocates in lesser extent.
(Damn, if attachment is enabled in this forum, then I don't need to go upload this bmp myself.
)