Capcom's next update to Street Fighter IV (which picks up the adjective Ultra) will include five additional playable characters.  Four of them — Poison, Hugo, Elena, and Rolento — are updated imports from their appearances in Street Fighter X Tekken, but the fifth is a new character entirely.  The company has been teasing that the fifth character is making her playable debut in Ultra, hinting that it's someone who has been on the Street Fighter  sidelines all these years.  As it turns out, the fifth character has been revealed as Decapre.  Not ringing a bell?  I was in the dark, too.  Here's how Capcom describes her:

Making her first brief appearance in a Street Fighter game as a non-playable character in Street Fighter Alpha 3, where she was seen as one of M. Bison’s Dolls, Decapre now joins the fight! Although a partial mask hides a giant burn mark located on this Russian beauty’s face, challengers will be scarred by her quick and elusive scramble moves as well as her psycho power infused attacks, which allow her to share her pain with her opponents.

Aside from a blink-and-miss-her appearance in Alpha 3, Decapre has appeared in UDON's Street Fighter comic series.  She sounds like she plays like a cross between Cammy and Vega with her lithe moves and claws.  I always enjoy learning how to play new Street Fighter characters, so I'll definitely try Decapre out when Ultra Street Fighter IV releases this summer.  I'm still holding out hope for a definitive Sony PlayStation 4 version.