This is how our new movement system works.
1. Choose a character
2. Choose a reaction for that character
3. Choose the size of the reaction area
4. Choose the movement path
All movement commands play out at the same time. You can only move one character in a turn. The available reactions depend on the chosen character. If another character enters your character's area of reaction, your chosen reaction plays out. If you were about to attack, your character charges. If you chose to be cautious, your character flees.
This movement system gives the player nice control over the character. You can choose to patrol back and forth with a maximum reaction area, you can stand still and wait for the opponent's initiative, or you can try to sneak past them and only react if someone gets too close.