Tenshi ni Narumon! EP5 - Not there but still there

It is vacation time and everyone is going to the beach! After a short argument between Papa and Gabriel, Mama decided it is the beach or nothing. Arriving, Mama immediately forces everyone to play beach volley ball. Yuusuke and Noelle escape with the excuse of going to get drinks for everyone, but Noelle gets distracted by a crab so Yuusuke goes on alone. He comes across a strange shop where the girl behind the counter is wrapped in bandages (though we only ever see her arms). Later, Grandma scared Yuusuke by enchanting the fire to chase him and he ends up back at the shop, which is closed now. The girl from earlier is back though and he discovers that it was actually Sara! She tells Yuusuke her reason for being invisible and then says she wants him to see her. She becomes visible but before Yuusuke can say anything, Noelle screams in the distance. She is being attacked once again by some monsters sent by Dispel. Yuusuke runs off to save her while Sara stands, dejected but fully visible. Yuusuke and Noelle get kidnapped by the monsters and they are taken up in the airship. Sara tries to tell the rest of the family but nobody will listen to her. She becomes so angry that she yells for them to stop playing around and becomes visible, shocking everyone into silence. Sara tells them about Yuusuke and Noelle and they go save the kids. Once everyone is safe, Papa "properly" introduces his oldest daughter Sara to Yuusuke.