Kumatora is the princess of Osohe Castle. She first meets with Duster in the second chapter, and then later meets, but does not join, Lucas at the end of chapter 3. Three years later, she is seen working at Club Titiboo in distress, but puts up with it to find Duster again, who had been missing for the three years. She also formally meets Lucas, and joins up with him on his adventures after discovering he had gotten stronger.
Kumatora is the second PSI user in Lucas' party, behind Lucas himself, and notably learns her abilities before Lucas does. She is also the only person on the team who knows PK Starstorm.
Kumatora appears as a sticker in Brawl.