Four separate sets made by jankey that, as evidenced by the last part as well as the title of them all, are connected and thus posted as one single collection by me. On a sidenote, I'm not deeply familair with Yugioh, so I have no idea if the villain we see here is an actual villain (big or small) appearing in any of the series or not, though a search of the name that appears in part 3 turned up no result so I have to assume he's either an entirely original character by jankey or a villain of the actual series that is so small he hardly deserves mention anywhere...
To Answer your Question DarkSpooky, no that male character is not in any of Yugioh series, The three characters are from different points in time as well as Anzu and Asuka have I think a 3-6 year gap, Aki is several decades into the future.
Although he looks like a demon child with Weevil Underwood's hair color but thats about it, may be a summoned monster who know
Base +6, DarkSpooky +13, ThamKanu +6, Prof. Tree +9, Gentleman Chimera +8