Question about OnSeePawn

Hi all, so I have a few questions about the OnSeePawn event.

Usually if you just want it to only see a certain character, you cast it as that character.
What about if you only want it to see two characters?

Also, I have 2 variables in my player class which are objects, referencing to two other blueprints/actors. How would I check to see if OnSeePawn sees those two?

The two actors are created through the character blueprint, and then each one is set to it’s own individual variable. How would I check to see if OnSeePawn sees those two variables/ actors in the scene??

Closed, because of duplication:

https://answers.unrealengine.com/questions/160410/question-about-onseepawn.html

I have a similar question and when I follow the link to the duplicate thread below, the page reports the answer has been deleted?!?!