Dangerous Sixteenth Birthday: She and Chikane gain their powers as the priestesses of the sun and moon on their 16th birthday, the same day that Yamato no Orochi first manifests and begins its attempt to destroy the world.
"I Know You're in There Somewhere" Fight: After Chikane rapes her and makes an apparent Face-Heel Turn, Himeko is convinced that Chikane wouldn't do such horrible things without a reason and tries to reason with her. However, Chikane only reveals her intentions after Himeko is forced to kill her.
Imaginary Love Triangle: Himeko thinks she's getting in the way of Chikane and Souma's relationship. In reality, both are interested in her.
Star-Crossed Lovers: With Chikane because the reincarnation loop requires one of them to kill the other. However, they probably finally are able to be together after Chikane breaks the reincarnation loop.
The Lunar Priestess. Chikane is a very commanding girl. She has a very noble and elegant aura, lives in a large mansion with many maids, and is considered to be of the highest standing at their school; she has a considerable fanbase following of both genders and is the frequent target of love confessions. However, she has been in love with Himeko since they first met.Associated tropes:
Green-Eyed Monster: She is jealous of Souma's closeness to Himeko and him being more capable to protect her in battle.
Guile Heroine: Pulls a Batman Gambit after recalling having killed Himeko in her past life. She rapes Himeko, steals Soma's Orochi mech, kills the other Orochi Heads and awakens Orochi herself. All this in order to get Himeko to kill her for the world rebirth ritual to be complete and to push her far enough to summon a god by herself since a memory of her old self implanted a hatred for said god in the back of her mind.
Yandere: Her feelings for Himeko border upon obsession and eventually Chikane ends up forcing herself on Himeko to keep her from thinking about anything besides her. Subverted since Chikane only did it to force Himeko to hate her and kill her so that Himeko could live on and be happy.
The Third Neck, he is one of the first Orochi to attack the miko. Girochi is said to be Miyako's younger brother. Presumably, the same war that destroyed his sister's church claimed the life of their parents and left Girochi traumatized and disillusioned. His mecha is Hi no Ashinazuchi, nicknamed Gungal.Associated tropes:
The Fifth Neck. She is an antisocial manga artist of few words. Reiko continues her "day job" as a member of the Orochi and has in fact done better on the market since joining, though her manga have taken on very dark themes since then, in fact, the reason why she joined Orochi was because the type of stories she originally liked didn't sell much, making her unable to make profit and reach for her dreams in the first place. Her mecha is Ho no Shuraizuchi.Associated tropes:
The Sixth Neck. She is a small Cat Girl who is often seen wearing a nurse's outfit and wielding a giant syringe. It is later revealed that she was the subject and victim of horrible medical experiments, which is most likely what made her an Orochi follower. Her mecha is Izuhara no Tamazuchi, nicknamed Meow Meow (Nya Nya).Associated tropes:
Himeko's childhood friend who is as popular at school as Chikane, which is why most of their fellow students believe he and Chikane are dating. He's supposed to be Orochi's Seventh Neck, but he was able to resist becoming completely evil and is the first Orochi to be purified. Like Chikane, he is in love with Himeko and is extremely protective of her. His mecha is Take no Yamikazuchi.Associated tropes:
The god of swords. When Orochi rises, it is prophesied that only the god of swords will stand against it and be able to undo the damage that Orochi causes. However, Himeko and Chikane are unable to complete the Ame no Murakumo summoning ritual for some reason.Associated tropes: