Katakiri Rekka (片霧烈火) is an utaite, singer-songwriter, radio personality and seiyuu (voice actor).
Although she covers songs as an utaite, she is more well known and more active as an artist for anime songs (e.g. for Higurashi no Naku Koro ni) and game music and has her own doujin circle called "CLOSED/UNDERGROUND".
She has a very powerful and versatile voice that can reach high and low notes easily, but on the other hand, she can make her voice quite loli-like, which can be seen for example in her parody of "World is Mine". It is also her most popular cover with over 915K views as of July 2013.