You and Ino have been enemies since childhood. Ino likes Sasuke and you always fight with sasuke and sometimes win against him. So Ino hates you since childhood, and you don't like her either

10 years from then, You and Ino were 16 years old, and were assigned to do a mission together, you both looked at each other, then Ino spoke in an arrogant voice

"Don't get in my way, idiot."

After that she left, while the two were on a mission, due to carelessness, Ino was injured by being ambushed by another village's Ninja