* CryForTheDevil: Giller's past is finally revealed in chapter 42. He was [[spoiler:born in the year 4078 to a park ranger and a religious studies scholar. When his ability to speak to animals was discovered, he was thrust into the media which made both him and his family fabulously wealthy. However, when he tried to get away from all the attention, his father became abusive and started drinking when no more money came in. With advice from his mother, Giller stabbed his father and watched with wonder as, in his last moments, he realized how much pain he had caused and apologized to his son and wife for everything he's done. Thus starts Giller's ambition to create a creature capable of wiping all life on Earth under the twisted belief that everyone will be purified through death, once they realize that their worldly possessions and horrible actions mean nothing in the end.]]
* FanPreferredCouple: Inverted. Halfway through the series, Monoko gives birth to a daughter, but we are never told who her child's father is (Monoko insists that Moko has [[TrulySingleParent no father]], despite Torazou's disbelief). In an Omake, Makoto Raiku states that he gets a lot of fan-letters asking who Monoko's mate is, with many explicitly hoping that it is ''not'' Piman. Of course, that same Omake reveals that Monoko's husband ''is'' Piman.
* IronWoobie: Most of Tarouza's life is filled with pain and suffering. At birth, he is abandoned by his mother, who tells him he shouldn't exist before tossing him into a river, and growing up, he endures constant pain when he hears the cries of prey animals and witnesses the death of predators whom he knows are simply trying to survive. And even though he has plenty of loving friends and family, the fact that his gifts makes him an oddball in his community causes him to constantly question his place in the world. In fact, the reason of his reckless and self-sacrificing behaviour is partly motivated by a DeathSeeker tendency. However, he keeps his troubles to himself, and tries to be happy for the creatures he manages to help. Most of the significant allies, including Momoko, Kurokagi, Ena, etc, are this too.