I didn't know at that point in time. It just sounded like him.
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IIRC BL-tan was literally an OC donutsteel some dude from BL's first generation (we're on the third or fourth right now) that literally nobody in the forum at the time (second generation, maybe third?) liked except for one person I don't recall who argued it'd be mean to the guy who originally drew it even though that guy hadn't posted in years, and somehow actually swayed the admins of the time and it got a free pass into the banner rotation despite being a terrible banner in every possible sense.
The discussion about banners was here:
http://forums.nrvnqsr.com/showthread...-the-home-page