For Aaron, what is the value of saving face?
It's worth nothing at all!
Moreover... The one who went to beg for mercy wasn't him, so he naturally didn't care at all.
'The purpose of going to Daqian this time is firstly to test the waters, secondly to sell some misery. Even if the Book Mountain Sword Pavilion doesn't help, maybe other sects will... The third objective...'
'If the situation really can't be reversed, just slip away directly?'
'Um... How about trying to save it first?'
As for why he let He Yu go with him?
Aside from asking him to go out and sell his misery, Aaron didn't want to meet the cultivators of the Book Mountain Sword Pavilion.
After all, he had done something bad before and was somewhat guilty...
Although he has changed his face, it's uncertain whether a Nascent Soul Sect like this would recognize him...
Even a slight possibility can't be taken as a risk!
...
With Aaron as a guide, crossing the boundless desert to reach Daqian was quite smooth.