Zentenkou (a Touhou LW original) refers to weatherproof, the ability to withstand all types of weather. This is an apt temperament for Mayumi, who subdues animal spirits in the extremely harsh Animal Realm. Dwellers of the Animal Realm seem to lack the three Essences because this chaotic realm is far from Heaven. Mayumi is endowed with Metal Phase, as a strong and loyal warrior, and Earth Phase, as a haniwa. The cold and silent Metal Phase resists Earth Phase, because earth bears metal, but it is weak to Fire Phase, because fire refines metal. The encompassing and regenerative Earth Phase resists Fire Phase, because fire produces earth, but it is weak to Wood Phase, because wood parts earth. The combination of Metal Phase and Earth Phase cancels out any resistance or weakness to Fire Phase.

Mayumi Joutouguu's ability as an idol created by Keiki Haniyasushin. The fact that her loyalty is so high and directly related to her actual competence is astounding. Mayumi is a haniwa soldier and an idol created by Keiki. Haniwa are clay figures that were made during the Kofun period. Although there are various theories about their purpose, it is thought they were placed on burial mounds to guide the buried person to peace and to distinguish and protect the place as a sanctuary. Therefore, it is likely that Keiki prepared Mayumi and the other haniwa soldiers for the peace and defense of the Primate Spirit Garden. As a being who follows orders, Mayumi's loyalty is directed toward her mistress, Keiki, and the human spirits Mayumi protects. On the other hand, Mayumi, as an idol, may also be an object of faith. This is a similar system to bunrei and the priests or shrine maidens who have become living gods. These systems of decentralized faith are also similar to how powerful clans obtained authority in the past. If faith was centralized, all faith would go toward Keiki, the producer of the haniwa, meaning that idolatry would not be possible. Idols basically stimulate local worship by using a portion of the faith offered to a god. This system is similar to local production and local consumption. Religious icons have been adapted to perform the same function and can generally be called idols too. However, we can assume that Mayumi was probably created to be an idol and was set up by Keiki. It is probably more efficient to gather faith in the Primate Spirit Garden with many idols that can be seen fighting rather than a divine spirit who is rarely seen. And it may be that the loyalty of the haniwa is a system that subsidizes the divine spirit faith for Keiki.