At least three different Tenshi's exist.

listed in terms of approximate popularity on last.fm
1) Canadian based Electronic music producer specializing in Dubstep and Wave.
2) It's supposed that there is a japanese artist under this name as well. The 'Similar Artists' lends some evidence towards this.
3) A UK artist, who has ventured from techno to classical guitar. A creative central pillar of the KULT(circa 2000), he used techno-in-a-can (warez?) software to produce mixes of Sean Kennedy and original compositions. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.