@Notic Bit late to the party, but I think that might be 2B wearing red glasses. Edit: Now it's 2B with the pink bow being put on her head by presumably 9S.
Did you know Sonic 3 was too big for one cartridge, so it was originally planned to release on the CDI, during the game's development Phillips had the rights to Michael Jackson's music. But the CDI proved to be a commercial flop, and most of the MJ tunes were cut, except for Launch Base Zone which in the Windows 98 port can be heard as this, in much better audio quality, the credits theme also resembles Morshu in Moscow.