Sale Habichtsburg is the Flame Haze of the title "Puppeteer of Devilish Skills". He is contracted to "Gorgeous Hanging Strings" Gizo and his color of flame is violet. Sale himself is an Artificial Flame Haze made by Dantalion's "forced contract experiments". Even so, he calls Dantalion the "old man" ( Oyaji?).
Sale once taught Chiara Toscana, and later on, she becomes his partner. He and Chiara shared fame as Flame Haze that even reached fellow Flame Haze Yuri Chvojka.
(Source: Shakugan.Wikia)