: The episode introduces Mawari Zenigata , Nagasumi's childhood friend and the strict leader of the school's Disciplinary Committee.
Detailed episode guides and character lists can be found on the My Bride is a Mermaid Wiki and Wikipedia . Seto no Hanayome - Episode 4
: Though her role is minor in this specific episode, she appears as a recurring background character often involved in the school's chaotic events. : The episode introduces Mawari Zenigata , Nagasumi's
: Mawari begins to suspect Sun's true nature after she briefly glimpses Sun's mermaid tail following a water-related accident at school. : The episode introduces Mawari Zenigata