Pretty cool, its no Kool the Hedgehog though. He always likes talking about them glory days with Sonic.
"Hey man, remember in 1992 when we fought Robotnik? Remember in '92 when they called him that?"
According to someone on the comments section, on the front page (username escapes me atm), its drawn by the same designer that did Miku. So, probably a fan song thing, but character seems legit.
it's not the same artist, Miku was designed by Kei, BRS was designed by Huke, she isnt actually a vocaloid, it's an original character design, but it inspired a guy who made Vocaloid songs on niconico to make a BRS song with vocaloid. they then formed a group and made actual vocaloid albums and songs for some fairly big name anime with vocaloid, it's pretty nuts for a doujin thing to go so far.
we dont know for SURE if it's sega related, but I believe George tagged it as rumour for that reason. the fact the site is nearly identical to code1935.jp registered by the same guy and the vocaloid connection makes it pretty likely though.