I don't think the gods read Leo Valdez fanfiction. Gods in that universe are often busy with more important things. They have to manage their powers, deal with other gods, and look after the affairs of the demigods. Fanfiction is a form of human creativity, and it's not something that would likely be on the gods' radar. It's more of an entertainment for the fans of the Leo Valdez stories.
Daniel was a figure known for his unwavering loyalty to God. He served in a foreign court but still adhered to his religious beliefs. This made him some enemies who plotted against him and got him thrown into the lions' den.
Since I'm not familiar with Kesz Valdez's full story specifically, it could be that he has made contributions in the area of social work. For example, he might have started an initiative to help the poor or the underprivileged. He could have a story of perseverance in the face of difficulties in getting his project off the ground, like finding funding, getting support from the community, and making a real impact on people's lives.
Daniel was a man who was very faithful to his God. He was living in a foreign land under a different king. But he didn't abandon his religious practices even when it was against the king's orders.