Loki ロキLoki
God of mischief (and in some versions chaos) in . Trapped in the body of a child, he seeks a way back to the realm of the gods and his original body. He is the father of Fenrir, Yamino (), and Hel. He has red-brown hair and green eyes; he also has an aversion to deep water, as well as a possibly small case of, since he seems to hate riding in cars. (Or perhaps he simply becomes carsick.) Loki has many romantic interests. In both series, loved him in the world of gods but he does not like her that way. Although in the anime, Loki is shown to be happy about Freya's feelings for him (Episode 13), ever since their initial confrontation where Loki learned of Freya's loneliness because of him. The youngest Sister, Skuld, is also attracted to him mostly because of his kindness and beauty. Mayura seems to have romantic feelings towards him because of his courage, intelligence and concern for her. However, Mayura is the only one of these three who doesn't know Loki is actually an age old god, thus, her affection is somewhat unclear. Another quality of Loki is that his sense of foresight is quite remarkable, as he can usually figure things out way before anyone else does (though Yamino, Fenrir, and Ecchan figured out who Spica really was long before Loki did). Loki is more wild and silly in the manga than he is in the anime (his personality more befitting his body in the manga); also his relationship with Mayura is seen more clearly. He's obviously in love with Mayura.
Mayura Daidouji
大堂寺繭良, Daidōji Mayura; まゆら is used in place of 繭良 after her introduction.
The main human character of the series: a pink-haired, red-eyed, 16-year-old, high school student obsessed with mysteries and the occult. Despite her love of mysteries, she never manages to find out who Loki is - partly because she has absolutely no , despite being the daughter of a . Mayura also seems to have romantic feelings towards Loki near the end of the anime series. However it is shown unclearly in the manga, since she only knows him as a child. She does not believe in God because her mother died despite countless prayers. There are significant differences in her personality in the manga and anime. In the manga, Mayura is calmer, not shouting "Fushigi mystery!" (strange mystery) as often as she does in the anime and seems to have a sharper sense (being able to know Loki is "different" and wanting to ask him who or what he was in the seventeenth chapter).
Yamino Ryusuke
闇野竜介, Yamino Ryūsuke; in the manga, various characters also address and refer to him as メガネ Megane, i.e. "glasses" or "four-eyes"
Loki's second son takes the form of a polite, boy in his late teens, and serves as his housekeeper, cook, and assistant. He enjoys cooking, cleaning and other domestic activities, and in the anime, he also has an amusing addiction to ordering useless items from . His real name is , also known as the , since his true form is that of a giant serpent that encircles the Earth. Loki rescued Yamino from the bottom of the sea by casting a spell on him (thus giving him a human form) so that he could accompany his father on Earth; for this, he is eternally grateful. The revelation of Yamino's true identity occurs earlier in the manga than the anime, and seems to play more of a part in his characterization for the first manga series. He probably wears glasses as a reference to the (眼鏡蛇 meganehebi, or "glasses snake", in Japanese).
Fenrir フェンリルFenriru
Loki's first son takes the form of a small black . His real identity is that of the Fenrisulfr, a giant wolf bound by the gods. Fenrir enjoys food and taunting Yamino. A in both the anime and manga is how Fenrir can be very bossy and intentionally crude around Yamino, then instantly become the most affectionate and harmless puppy-son possible the moment "Daddy" walks in (during the series, he has an almost scary Father Complex. He's very outwardly protective of Loki, spouting threats when Loki may be in danger). While the gods can understand his words, it would appear that when a human hears him talk all they hear is a regular dog (though his barking sounds like he's singing).
