He asked which manga protagonists had the Hellfire Phoenix ability, whether the master of one of the manga protagonists was a beautiful princess, whether the manga protagonists were half-demons, and whether the mother of the male protagonists in the manga was very powerful.

Bibliography: 'Fire Phoenix signed for three years and became the king of special forces.' In the book, the male protagonist had a Hellfire Phoenix in his body, which matched the plot mentioned in the question. The male protagonist joined the Fire Phoenix, which also matched the question. There was also the setting that the male protagonist was a half-demon. In addition, there was a mysterious beauty named "King of Hell" as the male lead's mentor. She was also a character that could not be ignored. The male lead's mother was also a very powerful character who could help him solve problems at critical moments. In summary,"Fire Phoenix signed for three years and became the king of special forces" was a web novel that fit the description of the problem very well. I hope you like this fairy's recommendation. Muah ~😗