So far there are not many interesting/memorable characters, but it is still early. I recommend setup some sokn and reveal them as story progress so we are more invested in them and the action/story progress. A guy from zombie mission and agility white boy from desert are clearly not enough.
Guarantee the only reason that short haired guy was willing to take fat landlady as his sugar mama is because he needs money to buy stuff from the survivor system. Let's wait and see if my prediction is correct.