This type of entertainment content is highly successful because it taps into "wholesome" or "comfort" media. Viewers tune in to see:
From a psychological perspective, animal ears tap into kindchenschema (baby schema)—a set of physical features, such as large eyes and rounded faces, that trigger an evolutionary nurturing response in humans. The addition of floppy or alert ears amplifies this cuteness, making characters instantly endearing. Emotional Shorthand for Writers Animal Dog Xxx Girl
Though Holo is a wolf deity rather than a domesticated dog, her character refined the trope by balancing wild, predatory instincts with deep emotional vulnerability. This type of entertainment content is highly successful