Pirica Usui

Horohoro's little sister, who trains him in a similar manner to Anna's training of Yoh.

Though not shown in the manga or anime, the author has stated that Pirica's partner spirit is Torara, a Marimo or Torasanpe as said in the Ainu language. Torara was said to have saved Pirica from drowning at an early age, and since then they became partners.