>>281530296
The girl in the hospital, Hasumi, is actually Ena herself, though the chapter ends on that reveal so it's currently unknown if it's been her civilian disguise for months/years and in that case why she'd bother doing that at all and pretending to be injured, or if something stranger is going on.

Also there's some yet unseen red cupid with Ena in one of the posters being sold at Kinokuniya.