Ohhh, the eternal question about 'Miraculous Ladybug'! I've spent way too many nights theorizing about this with fellow fans. Alya's loyalty to Marinette is rock-solid, but she's also fiercely protective of Ladybug's secret. Remember how she handled finding out in 'Ladybug'? She kept it under wraps even from Nino, her boyfriend. That said, Alya's a journalist at heart—truth matters to her. If she ever cracks, it'd only be under extreme circumstances, like Marinette's safety being at risk. But knowing Alya, she'd probably find a way to drop hints without outright confessing. Girl's got layers!
Plus, let's not forget the show's love for dramatic irony. The writers love teasing us with near-reveals. Maybe Alya almost slips up during a chaotic akuma fight, or Nino stumbles onto the truth himself. Either way, I doubt it'll happen cleanly—this show thrives on messy, emotional moments. Honestly, I'd love to see Nino's reaction though. Dude's chill, but that'd blow his mind.