26. Distance
Distance has never been an issue for them.
Whether it's when Reyna goes on her business trips half way across the world or when Leo is a couple of streets away at his Auto Repair Shop, it doesn't make a lick of difference. They say absence makes the heart grow fonder, and they also say out of sight, out of mind, but Leo doesn't agree with either.
He already loves Reyna so much, he is already helplessly caught up in everything that is her, that he can't grow any fonder. All absence does is make him long for her presence at his side again- all absence does is make sure he treasures every moment (or close to, at least, like any other couple they have their fights) when she is in front of him.
And he doesn't agree with out of sight, out of mind, because when Reyna is around she is all he thinks about, but when Reyna isn't around, she's still pretty much all he thinks about.
He wonders how her day is going, whether she's thinking about him too. Leo wonders if she had something cheap for lunch, like Subway, or maybe something she made beforehand. When Reyna isn't around, Leo hopes she's okay and having a nice time and that she'll come home soon because he misses her.
Another thing about them is that no matter where they are, no matter how much distance is between them, they make sure to speak to each other every night. When one of them is away for work, or visiting friends or crashing at the Jackson's (because Annabeth and Percy seem to have a permanent invitation to anyone needing a couch for the night) they will call without fail. And when they're right beside each other, like a couple should be, laying in their bed at night, they will talk in the darkness, saying things they would prefer not to see the light of day.
Leo Valdez loves Reyna Avila RamÃrez-Arellano and no amount of fights, time or distance can change that.
Quite frankly there isn't a chance in Hades.