SONiKA "Sonika Sonic"

About

SONiKA is an English VOCALOID developed and distributed by Zero-G Limited, and was released in July 2009 for the VOCALOID2 engine. SONiKA is advertised as a "virtual vocalist modeled on the voice of a young girl pop singer"; her voice provider has never been revealed.

(Source: vocaloid.wikia)

Alternative names/personalities:
Venomania-kou no Kyouki: Sonika Sonic