what happens when you use the chase character action?
both characters have to be in the same scene.
if you set a radius amount - then when the character doing the chasing enters said radius (in pixels) you can make it perform a linked "called by other action"!
here's the info for chase character from the action parts page in the wiki - well the short description/summary I have written thus far.
Allows you to make a character follow/chase another character around a scene; if the character doing the following/chasing enters the set radius then a linked "called by other action" can be performed - if an action is linked!
The two characters must be in the same scene!