Genjitsu (a Touhou LW original) refers to an atmospheric optical phenomenon where two bright dots appear to flank the Sun under certain conditions. This is an apt temperament for Aunn as these two dots are also called sun dogs. Aunn is endowed with Earth Phase, as her spirit is housed in statues, and Sun Essence, because she protects Shinto shrines and Buddhist temples. 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 alluring and arrogant Sun Essence resists the diverse and uncooperative Star Essence, but it is weak to the cooperative and indecisive Moon Essence.

This is Aunn's ability which likely comes from her being a komainu. However, it is unclear exactly what "locating Shintoism and Buddhism" means. Taking the name as read, it could be an ability that restores Shintoism and Buddhism to areas where it has fallen out of favor or been forgotten, but the truth is... unknown. What is known is that Aunn is especially focused on guarding Hakurei Shrine as a komainu. Considering the fact that youkai seem to come and go as they please, it raises a question about what it actually means to protect something. If her protection is derived from the literal meaning of her ability, then her true value may lie in maintaining Hakurei Shrine or the deity enshrined there. Maybe Aunn continuing to locate Shintoism and Buddhism is what lets Hakurei Shrine still function as a shrine despite the fact that the shrine maiden doesn't know which deity is enshrined there and that the shrine hardly gathers any faith... No, that's probably an exaggeration.