Hachi is such a combination of so many different personality traits, but these are the three primary fictional characters that I think Hachi draws from.
Rikku ( Final Fantasy X) - Hachi pulls her energy level and youthful behavior from Rikku. Her reactions are also based off of Rikku's very enthusiastic or adverse reactions to different things in the game. She is very animated and so is Hachi.
Xiaoyu ( Tekken )- Like Xiaoyu, Hachi has big dreams as far as where she is going in life. Also, like Xiaoyu she isn't afraid to put up her dukes if push comes to shove. She also reflects the same kind of dedicated loyalty to the people she cares about in her willingness to go to any length for them.
Pepper Potts ( armored adventures) - Hachi's insatiable curiosity and inability to not get into things is modeled after this version of Pepper Potts. She is also very excitable like Pepper.
Rikku ( Final Fantasy X) - Hachi pulls her energy level and youthful behavior from Rikku. Her reactions are also based off of Rikku's very enthusiastic or adverse reactions to different things in the game. She is very animated and so is Hachi.
Xiaoyu ( Tekken )- Like Xiaoyu, Hachi has big dreams as far as where she is going in life. Also, like Xiaoyu she isn't afraid to put up her dukes if push comes to shove. She also reflects the same kind of dedicated loyalty to the people she cares about in her willingness to go to any length for them.
Pepper Potts ( armored adventures) - Hachi's insatiable curiosity and inability to not get into things is modeled after this version of Pepper Potts. She is also very excitable like Pepper.