: The Hollow Shadow attempts to possess Akihito after being momentarily weakened. Akihito convinces Mirai to stab him with her blood blade to force the creature out, reminding her of his immortality. While the Hollow Shadow is expelled and subsequently defeated, the trauma of the "near-death" state triggers a catastrophic change in Akihito.
: Continuing the battle from the previous episode, Mirai and Akihito are trapped within the illusions created by the Hollow Shadow . Mirai is forced to confront her past through an illusion of Yui Inami, the girl she believes she killed. Meanwhile, Sakura Inami is revealed as Yui’s younger sister, seeking revenge on Mirai. kyoukai-no-kanata-dub-episode-4.mp4
[Rewatch][Spoilers] Kyoukai no Kanata - Episode 4 discussion : The Hollow Shadow attempts to possess Akihito