Sometimes. It depends on whether I address them personally. I used to send dreams to a friend of mine while we were fighting a war. Warnings of things to come, because I make a pretty good spy.

[ saying this, he pushes back the blankets, glad he's wearing the bed pants he went to sleep with. otherwise, this would be a lot more awkward. as he climbs out of the covers, he shifts to sit next to his doppelganger and looks up at him. ]

It helps to have an emotional connection with that person, though.

[ and he'd had quite the connection to percy, even if the son of poseidon had been unaware of nico's long standing crush. ]