Byuu had a twitter account called "Myuu" which was full of furry art and lewd imagery that alluded not to adult characters, but underage looking "cub" characters. Byuu's furry persona was of an underage-looking "wolf dragon" character, that wore diapers and used pacifiers.
https://archive.vn/MfUhq/f17247180a8722bcd4da98324db1b573ef6...
Along with Byuu's personal interest in using underage-looking characters for his own use, he also took the time to make a giant argument about the semantics and legality of lolicon and shotacon, which also is archived here.