Torara

Torara (トララ) is a Marimo nature spirit and the guardian ghost of Usui Pirica.

About
Torara is Pirica's guardian ghost and has the ability to manipulate water. He has been Pirica's guardian ghost ever since he saved her from drowning in a lake when she was young. However, he is very shy, even more so than Kororo, and has a fear of strangers. This is why, although Pirica has the skills of a shaman, Torara has never made an appearance in the series.

Anime/Manga Difference
Torara only makes a single cameo towards the end of the manga series, where he sits on top of Gororo's head.

Trivia

 * Torara is called "Torasanpe" in the Ainu language, which means "Lake Faries".