|Gallery | Relationship | Quotes|
|Other Names, etc.||Phoenix, Fenex etc.|
|Manga debut||Chapter 15|
|Light Novel debut||Light Novel Volume 1|
Phenex takes an appearance of a tall man who wears pants and a suit vest with a flame pattern on it as well as a black bow-tie, he always wears his mask and a hat. On his left arm, he has an accessory that takes the form of phoenix feathers.
When he first appeared in the Astrim and talked with Kazuki Hayashizaki, he seemed a wise and smart Diva telling Kazuki that he was in trouble, because of magic intoxication. He also acknowledges Kazuki as king.
Phenex made a contract with Miō at the same time as Koyuki Hiakari and Kazuki.
- In demonology, Phenex is a Great Marquis of Hell and has twenty legions of demons under his command.
- "Phenex" may be another way to write "Phoenix" as both share the same Japanese pronunciation, Fenikkusu. This is also pointed as Phenex wears phoenix feathers.