Hey there @AmZez! You’re probably looking to attach the actors. However it may be more prudent (depending on your gametype) to have the actor piggybacking be a different actor altogether. Regardless attachment would do the job. I’d likely treat the primary player like a vehicle in this regard. So here’s a tutorial that shows the faking of entering a vehicle, with animation, then possessing that vehicle. In your case the vehicle is your other character and you’ll likely be doing this in reverse however all the mechanics are there.
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Part 2: