I’m also completely new at this, but thought I would at least show you what I found out and it may help with some of what you are trying to do.
I was playing around with setting Serath’s wings to appear when collecting a ‘pick up’. This is what I have got so far: First picture is in the pickup Event Graph, Second is in the PlayerCharcter Event Graph
In the first event graph, the main event that makes the magic happen is the setting of the ‘Wings’ Variable (A Public variable I added to the Serath character).
I think you could add variable to the Serath character, something like Fallen (bool), make it public and then on an ‘event’ (for me it’s the pick up and the setting of the variable) do something like below:
Hopefully this gives you some ideas…
(Also note that currently I’m running that second graph every tick, which is stupid… but I was just trying to make it work first, better would be an event that only occurs once 
)