It's a Haptek girl from this website:

[sajjad]

How exactly do you install a new character to use?

I found a file I wanted to use, but it seems like Ultra Hal is rejecting it. I'm still on the free trial, would that be causing him to treat me like this?

It's a Haptek girl from this website:

[NIGE]

Welcome sajjad,
That is correct, you need the paid version & also the expansion pack to load any extra models.