Jareth the manipulator...

"Uh… But why only us?"

Mark was happy to learn new things, but he was confused as to why Jareth would go out of his way to just invite the two of them to follow him around.

Jareth looked into Mark's eyes and said in a calm tone,

"Simply because you are talented, as your teacher, I want to see how far you can grow…"

'For the sake of my life and for the sake of my future, you need to become strong, Mark, faster than ever…'

Jareth was planning to hit two birds at the same time. He will go to the desert for some important business and will take Mark and Risa too so that they can train to be stronger.

In the game, Aiza used to despise and talk badly of Jareth a lot, so Jareth doesn't like her much, so he doesn't want to add her to the team.

Just looking at her face makes him annoyed as he remembers the past of the original Jareth.

If not for all that, Jareth would have added her to the team, as she's a good fire mage.