I am writing a story that involves time travel, and I have a chapter where a character from the future interacts with his present-day self. This chapter is written from the present-day self's POV.
Early feedback on the chapter indicates that I'm not doing the greatest job distinguishing between the two instances of the character.
I'm very wary of using out-of-character perspective tropes (e.g. "the older blond", "the other man"); what are some good ways to distinguish between them without taking the reader too far out of the story?
YA genre, present-day character is 15; time-traveling character is 20.
So far I've used "the man", "his older counterpart", "his future self", "his older self", "Older Adrien", and "his other self".
The younger character -- and I think the one who is causing the most problems for my readers -- is only ever referred to "Adrien".
Both of them get "he" and "his" and I believe I am not breaking any of the rules that would make those difficult to distinguish.