Hey everyone, got a question on writing characters from other faiths

Assalamualaikum warahmatullahi wabarakatuh. I'm currently working on a creative story where the main character is non-Muslim, and it's written in the first person point of view. The character follows a religion such as Christianity or something similar, not being an atheist. In the narrative, they might mention their own deity's name within emotional or hopeful dialogues. As a Muslim writer myself, I'm reflecting on whether crafting such expressions might inadvertently be seen as problematic, even though my intention is purely artistic and there's no intention to commit shirk. I'd appreciate your thoughts on how to approach this thoughtfully while maintaining creativity.