Yoma Komatsu (or rather, a cartoon version of her) comes from the Guitar Freaks & Drummania music game series by Konami, specifically her appearance in the music video of the song Chikara where she and the rest of BeForU appeared as a cartoon rock band.

As for the person behind the character, Yoma was a member of the all female J-Pop group BeForU who performed music primarily for the Bemani series of rhythm games. She was part of the group from BeForU's debut in 2000 up to the end of 2007.

This MUGEN conversion of this character incorporates music and game features related to the Bemani series as her attack techniques, back when BeForU was under Konami and before GFDM counted up to "V".

Download her at RandomSelect:
http://randomselect.piiym-net.com/ (less info)