The Michael x Charlie ship is one of those pairings that has a dedicated niche following, especially within certain corners of the 'Five Nights at Freddy's' fandom. I've seen a mix of strong opinions on this—some fans adore the dynamic between these two characters, weaving intricate headcanons about their relationship, whether it's romantic, platonic, or even antagonistic. The appeal often lies in the contrast between Michael's tragic, haunted past and Charlie's role as a protector or victim in the series. Fanfiction and art explore this pairing with themes of redemption, shared trauma, or even dark romance, depending on how people interpret the lore.
That said, it's not as universally popular as some other ships in the fandom, like, say, Foxy x Mangle or Glamrock Freddy x Gregory. Part of the reason might be the ambiguity of their canon interactions. Charlie's presence in the games is more tied to the books, while Michael's arc is central to the later games. The lack of direct, clear moments between them in the main storyline makes it a more speculative ship. Still, the creativity of the fandom fills in those gaps beautifully, and if you dive into AO3 or Tumblr tags, you'll find some surprisingly deep and emotional takes on these two.