Hitomi (known as Rebecca or Teresa in dubbed versions) is an incredibly intelligent and curious young girl. Whenever anything captures her interest she will point her laptop towards it and study it. She has a fairly even temperament, but she became irritated when Satoshi accidentally took her scheduled place in the Battle Tower. She is also very inquisitive, and when she cannot find an answer on her laptop, she becomes frustrated. This was shown by her reaction towards the mystery of auroras appearing away from the North and South Poles.

Hitomi briefly reappeared in the opening sequence of *Pokémon Ranger to Umi no Ouji Manaphy*, where she was seen fighting Yuuki's Laglarge with her Bangiras. She later briefly reappeared in a montage in *Dialga vs. Palkia vs. Darkrai*, which chronicled the preceding nine movies.

Her partner Pokémon is a Metagross.