[Marina is not big enough to facilitate long-term avoidance. It's a miracle, really, that Nathan has managed to avoid Euphie for as long as he has, given his predisposition toward aimless wandering. And he doesn't want to avoid her, really. When being around her doesn't go horribly wrong, it makes him happy.
Perhaps it's fortunate, then, that Nathan catches sight of Euphie outside. He fights his initial inclination, which is to walk away. Walking away might be the only way to ensure that he never hurts her again, but it's also a good way to never talk to her again, and he doesn't want that. He really wants to talk to her. She might not be completely opposed to talking to him. This can work.]
Euphie?
[Nathan hasn't noticed that he has picked up a superpower in the form of temperature control. The area within about three feet of him has been cooling and heating in response to his emotions—emotions that have been mild enough, thus far, to avoid significant temperature spikes. If Euphie gets close, though, she might notice that Nathan's immediate vicinity is warmer than the ambient temperature.]