Yes, they are. Azula and Luc tells me that Lex is very useful as well. Prepare to be a part of their CR. u.u

Temari is awesome and strong too... but she's morally neutral. It's okay cause those other three are really obscure canon characters... ish.. XD

And as for NPC labor, go work on that. As far as I know, Nova City is the most expensive city to live in. So the starting money you get can get you settled in there for a month. But I'm sure Lex is very good at multiplying that amount since he's very industrious... and cunning.

Sailor Moon will not be happy if you do something bad to all those people though. u.u