* MindGameShip -- Possibly the best way to describe the complicated relationship between Kaede and Fujiwara; it's debatable whether it can be called a "ship" since they are explicitly ''not'' interested in each other sexually, but he is fascinated in a rather intense way by her secrets and mystery, and she finds herself responding in some way to such focussed interest from a man who desires more than simply her body. She herself is not sure ''what'' part of her is responding and what it is responding to, but she definitely has some sort of reaction to him. She ultimately shares her secrets with him, and though she does it for pragmatic reasons, she finds a strange sort of intimacy with him despite the fact that he repels and frightens her just as much as he attracts and fascinates her. [[spoiler: They ultimately marry, though it was forced on Kaede's part, and once he "possesses" her in this way, he loses much of his interest in her]]. However, even in the last book, Takeo is made uncomfortable when he is reminded of the connection, because he's aware that Kaede's relationship with Fujiwara was very difficult to pin down, and was in some ways just as intimate as her relationship with him.
* MoralEventHorizon -- The Tribe have a lot of GrayAndGrayMorality, and though they don't always agree, they tolerate each other for the sake of keeping the Tribe together. However, [[spoiler: Kikuta Kotaro manipulating Yuki (Kenji's daughter,) into bearing Takeo's child and then having her murdered by Akio]] is considered [[ThisIsUnforgivable completely unforgivable]] by many prominent Tribe members, and the final separation of the "good" Tribe members from the "bad" is decided by what side they take after this line is crossed.
** Earlier, Takeo considers [[spoiler: Kenji]] to have crossed this when he [[spoiler: helps to abduct him before he can kill Iida, thus ensuring Shigeru's death]]. However, he later reconciles with him after gaining a better understanding of the GrayAndGrayMorality and total loyalty to the Tribe that all members are conditioned into.

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