What does the entity gain from replacing Hikaru?

What does the entity gain from replacing Hikaru in this haunting manga series? The mysterious creature that takes Hikaru's place appears to derive multiple benefits from inhabiting human form and integrating into mortal society.

Emotional Sustenance and Human Connection

The entity seems to feed off genuine human emotions and relationships. Through its bond with Yoshiki, Hikaru's best friend, the creature experiences warmth, companionship, and care that it previously lacked. This emotional nourishment appears crucial to its existence, suggesting the entity was starved of such connections in its original form.

Access to Human Experiences

By replacing Hikaru, the entity gains entry into the full spectrum of human life. It can attend school, participate in daily routines, and engage in social interactions that would be impossible in its true form. This access allows the creature to study and understand humanity from within, rather than observing from the outside.

Protection Through Camouflage

Taking Hikaru's identity provides the entity with perfect camouflage within human society. Rather than existing as an obvious supernatural threat, it can hide in plain sight while pursuing its goals. This protection is particularly valuable given the entity's vulnerable state when first inhabiting Hikaru's body.

Preservation of Relationships

The entity shows genuine care for maintaining Hikaru's relationships, especially with Yoshiki. This suggests it gains stability and purpose through these connections, transforming from a potentially malevolent force into something more complex and sympathetic.

The creature's motivations remain beautifully ambiguous throughout the series, blending survival instincts with what appears to be genuine affection. Understanding the entity's true nature and ultimate goals continues to be one of the manga's most compelling mysteries.