Hikaru

Hikaru is Yoshiki Tsujinaka's childhood friend whose body is occupied by an otherworldly being in The Summer Hikaru Died.

Hikaru's role in The Summer Hikaru Died

Yoshiki recognizes that the returned Hikaru is not human but keeps the secret because he cannot bear another loss.

Hikaru's story role and defining traits

The false Hikaru's attachment to Yoshiki drives the story's mixture of grief, intimacy, and supernatural horror.