Thread:NewGenTV/@comment-24053170-20150408001529

Minatsuki herself says that her whip wing travels at the speed of light when she kills the undertakers attacking Ganta in the anime. In episode 11 she state in her own words-

Minatsuki- "Faster then light attacks kick some serious ***, yeah?"

So her attacks are beyond supersonic speed in the anime. thus the trivia about her being the 3rd supersonic branch of sin is wrong. This quote is in ep 11 at 14:48. 