動画再生のスピードが遅いですか?! ですかちゃん ですかさん
In late June 2011, there were crudely drawn ads for Registry Booster for Japanese IPs, attached with the phrase 
"動画再生スピードが遅いですか？" (Is your video playback speed being slow?). People shortly began calling the character Desuka-san or Desuka-chan.


h4. External links

* Nicopedia: "Registry booster":http://dic.nicovideo.jp/a/registrybooster
desuka