I love how this topic keeps getting resurrected, lol. Ayumi or anybody wearing a shirt with Jesus or wearing a cross means nothing for the most part. I could put on a Jesus shirt and I actually own crosses but it doesn't mean I'm Christian.

Also, I dunno if it was someone in this forum who smartly brought it up, but Ayumi learned about Maria from a friend. This means, she wasn't brought up Christian at all. Conversion is possible but doubtful.