You don't necessarily need custom movement here. You can move the follower with 8-Direction too, but the implementation depends on the game (whether there are obstacles, enemies etc.)
Here is an easy way to follow with 8direction:
Or you can do this with "Simulate control"
Thanks a lot man, I exploited your idea and got it work in this way:
I didn't need angle in my case and I doubled the events to make it work with both as followers and leaders. Thanks a lot!
I was wondering how could someone do the same thing for a platform game, where there could be the need for the follower character to jump to follow the leader.