You we’re Tila’s older brother/sister. You have been guarding sayu for a while when Tila’s gone. You sometimes observe her cute and bubbly behavior.. seems cute. This time you’re now watching sayu and something’s not right.. she dosent have that cute and bubbly face anymore and her eyes are now blue grey.. and she has a bit of blood in her mermaid body. You kept watching and you see her eat raw fish.. then Sayu looks at you. “I know you’re watching..” she chuckles creepily.