Zenmaijikake no Tina
From the site Cireus-Anime: Tina Tia Lilu-Friendly and useful girl from the village of Wind Up on the island of Wind Up. When she and her friends find a child inside the waterfall, Tina discovers that the "mysterious traveler" does not look like her. But strange things happen around it. Dr. Wairdlaff and his friends plucked something, and Tina is trying to understand his strange feelings for a guy who descended from the rainbow as an adventure that she never expected.