During the battle at the green lotus domain, the Fire Phoenix had been suspicious of Lu Zhou's identity. He had thought that Lu Zhou was an expert from the Great Void. However, the more he thought about it, it thought if Lu Zhou was truly an expert from the Great Void, during their first battle in the Unknown Land, Lu Zhou would not have fought it alone nor would Lu Zhou allow a divine beast like it to leave. Hence, it dismissed its suspicion.
Later on, apart from ensuring its own safety, the Fire Phoenix also had to consider the Little Fire Phoenix's safety. In the end, it had no choice but to entrust the Little Fire Phoenix to Lu Zhou's disciple, Little Yuan'er. After that, it had no other chance to determine Lu Zhou's identity.
