Wa-alaikum-salam
Muhammad (SAWS) told Aisha that a girl who is silent must be consulted for marriage, according to several hadith.
In fact, when a girl asked the Prophet about her complaint for forced marriage, he supported her rights.
Regarding Aisha's age, she said that she already reached her puberty, so I think that 6 or 9-year-old in a hadith is an error.
Besides, other Muhammad's wives were much older than Aisha whatsoever.
If he was a pedophile, than he would marry all young girls.