Some more Tiny And Terrifyingly Cute AU facts. Yami never ages. He stays the same cute baby age until Memory World, where he takes the saying “they grow up so fast” on a whole new level.
I imagine he was a very pretty child back then, and grew to be even prettier (I mean, have you guys seen the rare well-animated scenes, hot damn). My headcanon is that his dad probably glared into submission any suitors that he deemed unworthy.